GITNUXREPORT 2026

Waste Statistics

Global waste output is massive and growing, with stark disparities between wealthy and developing nations.

How We Build This Report

01
Primary Source Collection

Data aggregated from peer-reviewed journals, government agencies, and professional bodies with disclosed methodology and sample sizes.

02
Editorial Curation

Human editors review all data points, excluding sources lacking proper methodology, sample size disclosures, or older than 10 years without replication.

03
AI-Powered Verification

Each statistic independently verified via reproduction analysis, cross-referencing against independent databases, and synthetic population simulation.

04
Human Cross-Check

Final human editorial review of all AI-verified statistics. Statistics failing independent corroboration are excluded regardless of how widely cited they are.

Statistics that could not be independently verified are excluded regardless of how widely cited they are elsewhere.

Our process →

Key Statistics

Statistic 1

Global cost of waste mismanagement is $361 billion annually

Statistic 2

Investing in waste management yields $4.20 return per $1 in low-income countries

Statistic 3

US spent $80 billion on waste management in 2018

Statistic 4

Recycling creates 1.17 million US jobs, $37.8 billion wages

Statistic 5

Global recycling market value $350 billion in 2022

Statistic 6

Food waste costs global economy $1 trillion yearly

Statistic 7

Plastic waste management costs EU €10-12 billion per year

Statistic 8

E-waste contains $62.5 billion raw materials value unrecovered in 2022

Statistic 9

Landfilling costs US municipalities $50 per ton average

Statistic 10

Waste-to-energy plants generate $1.6 billion revenue in EU annually

Statistic 11

Informal waste recycling in developing countries worth $10-30 billion

Statistic 12

Australia's waste sector contributes $14.5 billion GDP, 55,800 jobs

Statistic 13

China's waste incineration investments $100 billion by 2025

Statistic 14

India spends 0.3% GDP on waste management, needs double

Statistic 15

Global plastic packaging leakage costs $100 billion in cleanup

Statistic 16

UK waste management industry £10.2 billion turnover in 2022

Statistic 17

Recycling aluminum saves 95% energy, $1 billion US industry savings

Statistic 18

Hazardous waste management US market $40 billion in 2023

Statistic 19

Food waste in US $161 billion economic loss annually

Statistic 20

Global e-waste recycling market projected $75 billion by 2030

Statistic 21

Waste collection costs 50-80% of total municipal budgets in low-income cities

Statistic 22

Composting industry in US generates $1.5 billion revenue

Statistic 23

Extended Producer Responsibility schemes recover €5-10 per tonne extra

Statistic 24

Landfill tipping fees average $55/ton US, up 20% since 2018

Statistic 25

Circular economy in plastics could save $4.5 trillion by 2050

Statistic 26

Global methane from landfills is 11% of total emissions

Statistic 27

Waste sector contributes 3-4% to global GHG emissions

Statistic 28

Open burning of waste releases 700 million tonnes CO2eq annually

Statistic 29

Landfilled food waste generates 8-10% of global methane emissions

Statistic 30

Plastic waste pollution: 11 million tonnes enter oceans annually

Statistic 31

E-waste leaching contaminates soil with lead up to 50 times safe levels

Statistic 32

US landfills emit 14.3 million metric tons methane in 2021

Statistic 33

Global waste-related air pollution causes 1 million premature deaths yearly

Statistic 34

Dioxins from waste incineration: 5-10 grams TEQ globally per year pre-controls

Statistic 35

Leachate from landfills pollutes groundwater with nitrates 100x standards

Statistic 36

Marine litter from rivers: 1-2 million tonnes plastic per year

Statistic 37

Food waste contributes 6% global GHG, equivalent to 3.3 billion tonnes CO2eq

Statistic 38

E-waste informal processing releases 0.4 million tonnes heavy metals yearly

Statistic 39

Microplastics from waste: 35% atmospheric deposition to oceans

Statistic 40

Landfill fires release 1.5 million tonnes CO2eq annually worldwide

Statistic 41

Hazardous waste incineration emits 2% global mercury emissions

Statistic 42

Waste picking exposes 15 million people to toxins, health risks

Statistic 43

Global ocean plastic could triple by 2040 without intervention

Statistic 44

Landfills occupy 0.7% of global land but impact biodiversity hotspots

Statistic 45

Ammonia from waste decomposition affects 20% EU air quality exceedances

Statistic 46

Plastic additives like phthalates contaminate 80% global seafood

Statistic 47

E-waste PCBs persist in Arctic food chains, bioaccumulate 1000x

Statistic 48

Open dumps in low-income countries pollute 30% rivers with coliforms

Statistic 49

Waste incinerators emit PM2.5 contributing to 5% urban pollution deaths

Statistic 50

Global waste methane potential 1.1 GtCO2eq by 2050 if unmanaged

Statistic 51

Textile waste dyes pollute 20% rivers in Asia with heavy metals

Statistic 52

Landfill gas captures only 25% of potential methane globally

Statistic 53

In the US, paper and paperboard comprised 23% of MSW generated in 2018, totaling 67.5 million tons

Statistic 54

Plastics made up 12.2% of US MSW in 2018, about 35.7 million tons

Statistic 55

Food waste accounted for 21% of US MSW generation in 2018, or 63.1 million tons

Statistic 56

Yard trimmings represented 12.1% of US MSW in 2018, totaling 35.4 million tons

Statistic 57

Metals comprised 9% of US MSW in 2018, about 26.2 million tons

Statistic 58

Glass was 4.9% of US MSW in 2018, 14.3 million tons

Statistic 59

Rubber, leather, and textiles made up 11.1% of US MSW, 32.4 million tons in 2018

Statistic 60

Other wastes were 6.7% of US MSW, 19.6 million tons in 2018

Statistic 61

Organics constitute 59% of global MSW in low-income countries

Statistic 62

Dry materials make up 81% of MSW in high-income countries

Statistic 63

Paper and cardboard is 17% of global MSW composition

Statistic 64

Plastics are 12% of global MSW

Statistic 65

Metals 5%, glass 5%, other 61% of global MSW

Statistic 66

In the EU, food and garden wastes are 28% of MSW composition

Statistic 67

Paper and cardboard 21%, plastics 11.8% in EU MSW

Statistic 68

Metals 6.3%, glass 7.6% in EU MSW composition

Statistic 69

In China, food waste is 55.9% of urban MSW composition

Statistic 70

Paper 8.3%, plastics 10.4%, other in China urban MSW

Statistic 71

India's MSW has 51% compostable organics, 17.5% recyclables

Statistic 72

Inert materials 28%, refuse 3.5% in Indian MSW

Statistic 73

E-waste composition: 44% metals, 34% plastics, 12% glass

Statistic 74

Hazardous substances in e-waste include 1.7% by weight

Statistic 75

Global plastic waste: 46% single-use packaging

Statistic 76

Food packaging plastics 15%, consumer goods 12% in global plastic waste

Statistic 77

Industrial waste in US: metals 23%, minerals 20%, organics 15%

Statistic 78

US MSW durable goods 17.6%, nondurable 13.7% in 2018

Statistic 79

Containers and packaging 28.1% of US MSW in 2018

Statistic 80

Global food waste composition: 60% avoidable, 26% potentially avoidable, 14% unavoidable

Statistic 81

In 2016, the world generated 2.01 billion tonnes of municipal solid waste, with East Asia and Pacific region producing the most at 468 million tonnes

Statistic 82

High-income countries generate 34% of global MSW but only 16% of world population, averaging 728 grams per capita per day

Statistic 83

Low-income countries generate 93 grams per capita per day of MSW, projected to rise to 156 grams by 2050

Statistic 84

The United States generated 292.4 million tons of municipal solid waste (MSW) in 2018, or 4.9 pounds per person per day

Statistic 85

In the EU-27, total waste generation excluding major mineral wastes was 2.7 billion tonnes in 2020

Statistic 86

China generated about 210 million tonnes of MSW in 2019, making it the largest producer globally

Statistic 87

India produced 62 million tonnes of MSW in 2021, expected to reach 165 million tonnes by 2030

Statistic 88

Japan generated 41.8 million tons of general waste in fiscal year 2021

Statistic 89

Brazil generated 78.3 million tonnes of MSW in 2019

Statistic 90

In 2022, the UK produced 27.2 million tonnes of household waste

Statistic 91

Australia generated 76 million tonnes of solid waste in 2020-21

Statistic 92

South Africa produced 122 million tonnes of general waste in 2022

Statistic 93

Nigeria generates about 32 million tonnes of solid waste annually

Statistic 94

Global construction and demolition waste accounts for 35% of total solid waste

Statistic 95

In 2019, the US generated 42.1 million tons of steel scrap from manufacturing and industrial processes

Statistic 96

Europe's industrial waste generation totaled 2.9 billion tonnes in 2020

Statistic 97

Global e-waste generation reached 62 million tonnes in 2022

Statistic 98

Food waste globally amounts to 1.05 billion tonnes per year

Statistic 99

Plastic waste generation worldwide was 353 million tonnes in 2019

Statistic 100

In 2020, the US food supply chain generated 66 million tons of food waste

Statistic 101

Global plastic packaging waste reached 141 million tonnes in 2015

Statistic 102

E-waste in Europe generated 6.2 million tonnes in 2022

Statistic 103

India's plastic waste generation was 3.4 million tonnes in 2018-19

Statistic 104

US hazardous waste generation was 35.2 million tons in 2020

Statistic 105

Global medical waste surged by 25% during COVID-19 peak in 2020

Statistic 106

Agricultural waste in India is 500 million tonnes annually

Statistic 107

Worldwide, 2.24 billion tonnes of MSW was generated in 2020

Statistic 108

Sub-Saharan Africa generated 95 million tonnes of MSW in 2016

Statistic 109

Middle East and North Africa produced 132 million tonnes of MSW in 2016

Statistic 110

In the US, 24% of municipal solid waste was recycled in 2018, totaling 69.9 million tons

Statistic 111

Composting accounted for 8.5% of US MSW management in 2018, 24.9 million tons

Statistic 112

Landfilling disposed of 50% of US MSW in 2018, 146.1 million tons

Statistic 113

Combustion with energy recovery managed 12.5% of US MSW, 36.5 million tons in 2018

Statistic 114

Globally, only 13.5% of food waste is recycled or composted

Statistic 115

19% of global MSW is recycled, 5% composted, 48% landfilled

Statistic 116

In the EU, 48% of MSW is landfilled, 25% recycled, 17% incinerated in 2020

Statistic 117

Germany's MSW recycling rate is 67.7% in 2021

Statistic 118

Japan recycles 20% of MSW, incinerates 80% with energy recovery

Statistic 119

South Korea has 59% MSW recycling rate in 2021

Statistic 120

China landfilled 52% of MSW, recycled 26%, incinerated 22% in 2019

Statistic 121

India's MSW treatment: only 70% collected, 31 cities have waste-to-energy

Statistic 122

Only 9% of plastic waste is successfully recycled globally

Statistic 123

E-waste formal recycling rate globally is 22.3% in 2022

Statistic 124

US paper recycling rate 68.2% in 2018

Statistic 125

Steel recycling rate 54% in US construction waste

Statistic 126

EU municipal waste recycling rate reached 48.7% in 2021

Statistic 127

UK household waste recycled or composted 45% in 2022

Statistic 128

Australia's national waste recovery rate 64% in 2020-21

Statistic 129

Brazil recycles only 1.4% of MSW, landfilled 58.4%

Statistic 130

Africa recycles less than 10% of MSW, mostly informal sector

Statistic 131

Global incineration capacity needs to triple by 2050 for waste management

Statistic 132

US hazardous waste treated or disposed: 94% in 2020

Statistic 133

Landfills worldwide receive 37% of plastic waste, 12% incinerated, 49% mismanaged

Statistic 134

Food waste composting in EU is 15% of biodegradable waste

Statistic 135

US recycling rate for aluminum cans 50% in 2022

Statistic 136

Global paper recycling rate 59.9% in 2021

Statistic 137

Glass recycling in US 31% in 2018

Trusted by 500+ publications
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Picture this: while the average American throws out nearly 5 pounds of trash daily, a person in a low-income country produces less than a hundred grams, yet the global mountain of waste we create each year is staggering and tells a complex story of consumption, inequality, and environmental impact.

Key Takeaways

  • In 2016, the world generated 2.01 billion tonnes of municipal solid waste, with East Asia and Pacific region producing the most at 468 million tonnes
  • High-income countries generate 34% of global MSW but only 16% of world population, averaging 728 grams per capita per day
  • Low-income countries generate 93 grams per capita per day of MSW, projected to rise to 156 grams by 2050
  • In the US, paper and paperboard comprised 23% of MSW generated in 2018, totaling 67.5 million tons
  • Plastics made up 12.2% of US MSW in 2018, about 35.7 million tons
  • Food waste accounted for 21% of US MSW generation in 2018, or 63.1 million tons
  • In the US, 24% of municipal solid waste was recycled in 2018, totaling 69.9 million tons
  • Composting accounted for 8.5% of US MSW management in 2018, 24.9 million tons
  • Landfilling disposed of 50% of US MSW in 2018, 146.1 million tons
  • Global methane from landfills is 11% of total emissions
  • Waste sector contributes 3-4% to global GHG emissions
  • Open burning of waste releases 700 million tonnes CO2eq annually
  • Global cost of waste mismanagement is $361 billion annually
  • Investing in waste management yields $4.20 return per $1 in low-income countries
  • US spent $80 billion on waste management in 2018

Global waste output is massive and growing, with stark disparities between wealthy and developing nations.

Economic Impact

1Global cost of waste mismanagement is $361 billion annually
Verified
2Investing in waste management yields $4.20 return per $1 in low-income countries
Verified
3US spent $80 billion on waste management in 2018
Verified
4Recycling creates 1.17 million US jobs, $37.8 billion wages
Directional
5Global recycling market value $350 billion in 2022
Single source
6Food waste costs global economy $1 trillion yearly
Verified
7Plastic waste management costs EU €10-12 billion per year
Verified
8E-waste contains $62.5 billion raw materials value unrecovered in 2022
Verified
9Landfilling costs US municipalities $50 per ton average
Directional
10Waste-to-energy plants generate $1.6 billion revenue in EU annually
Single source
11Informal waste recycling in developing countries worth $10-30 billion
Verified
12Australia's waste sector contributes $14.5 billion GDP, 55,800 jobs
Verified
13China's waste incineration investments $100 billion by 2025
Verified
14India spends 0.3% GDP on waste management, needs double
Directional
15Global plastic packaging leakage costs $100 billion in cleanup
Single source
16UK waste management industry £10.2 billion turnover in 2022
Verified
17Recycling aluminum saves 95% energy, $1 billion US industry savings
Verified
18Hazardous waste management US market $40 billion in 2023
Verified
19Food waste in US $161 billion economic loss annually
Directional
20Global e-waste recycling market projected $75 billion by 2030
Single source
21Waste collection costs 50-80% of total municipal budgets in low-income cities
Verified
22Composting industry in US generates $1.5 billion revenue
Verified
23Extended Producer Responsibility schemes recover €5-10 per tonne extra
Verified
24Landfill tipping fees average $55/ton US, up 20% since 2018
Directional
25Circular economy in plastics could save $4.5 trillion by 2050
Single source

Economic Impact Interpretation

The staggering $361 billion global price tag of waste mismanagement screams that we’re throwing away not just trash but trillions in economic opportunity, millions of jobs, and an entirely more stable planet, proving that smart waste management is not an expense but the ultimate high-yield investment in our future.

Environmental Impact

1Global methane from landfills is 11% of total emissions
Verified
2Waste sector contributes 3-4% to global GHG emissions
Verified
3Open burning of waste releases 700 million tonnes CO2eq annually
Verified
4Landfilled food waste generates 8-10% of global methane emissions
Directional
5Plastic waste pollution: 11 million tonnes enter oceans annually
Single source
6E-waste leaching contaminates soil with lead up to 50 times safe levels
Verified
7US landfills emit 14.3 million metric tons methane in 2021
Verified
8Global waste-related air pollution causes 1 million premature deaths yearly
Verified
9Dioxins from waste incineration: 5-10 grams TEQ globally per year pre-controls
Directional
10Leachate from landfills pollutes groundwater with nitrates 100x standards
Single source
11Marine litter from rivers: 1-2 million tonnes plastic per year
Verified
12Food waste contributes 6% global GHG, equivalent to 3.3 billion tonnes CO2eq
Verified
13E-waste informal processing releases 0.4 million tonnes heavy metals yearly
Verified
14Microplastics from waste: 35% atmospheric deposition to oceans
Directional
15Landfill fires release 1.5 million tonnes CO2eq annually worldwide
Single source
16Hazardous waste incineration emits 2% global mercury emissions
Verified
17Waste picking exposes 15 million people to toxins, health risks
Verified
18Global ocean plastic could triple by 2040 without intervention
Verified
19Landfills occupy 0.7% of global land but impact biodiversity hotspots
Directional
20Ammonia from waste decomposition affects 20% EU air quality exceedances
Single source
21Plastic additives like phthalates contaminate 80% global seafood
Verified
22E-waste PCBs persist in Arctic food chains, bioaccumulate 1000x
Verified
23Open dumps in low-income countries pollute 30% rivers with coliforms
Verified
24Waste incinerators emit PM2.5 contributing to 5% urban pollution deaths
Directional
25Global waste methane potential 1.1 GtCO2eq by 2050 if unmanaged
Single source
26Textile waste dyes pollute 20% rivers in Asia with heavy metals
Verified
27Landfill gas captures only 25% of potential methane globally
Verified

Environmental Impact Interpretation

Our planet is essentially holding a toxic garage sale that nobody asked for, where the air, land, and water are paying the price with everything from climate-altering methane leaks to a side of microplastics in your dinner.

Waste Composition

1In the US, paper and paperboard comprised 23% of MSW generated in 2018, totaling 67.5 million tons
Verified
2Plastics made up 12.2% of US MSW in 2018, about 35.7 million tons
Verified
3Food waste accounted for 21% of US MSW generation in 2018, or 63.1 million tons
Verified
4Yard trimmings represented 12.1% of US MSW in 2018, totaling 35.4 million tons
Directional
5Metals comprised 9% of US MSW in 2018, about 26.2 million tons
Single source
6Glass was 4.9% of US MSW in 2018, 14.3 million tons
Verified
7Rubber, leather, and textiles made up 11.1% of US MSW, 32.4 million tons in 2018
Verified
8Other wastes were 6.7% of US MSW, 19.6 million tons in 2018
Verified
9Organics constitute 59% of global MSW in low-income countries
Directional
10Dry materials make up 81% of MSW in high-income countries
Single source
11Paper and cardboard is 17% of global MSW composition
Verified
12Plastics are 12% of global MSW
Verified
13Metals 5%, glass 5%, other 61% of global MSW
Verified
14In the EU, food and garden wastes are 28% of MSW composition
Directional
15Paper and cardboard 21%, plastics 11.8% in EU MSW
Single source
16Metals 6.3%, glass 7.6% in EU MSW composition
Verified
17In China, food waste is 55.9% of urban MSW composition
Verified
18Paper 8.3%, plastics 10.4%, other in China urban MSW
Verified
19India's MSW has 51% compostable organics, 17.5% recyclables
Directional
20Inert materials 28%, refuse 3.5% in Indian MSW
Single source
21E-waste composition: 44% metals, 34% plastics, 12% glass
Verified
22Hazardous substances in e-waste include 1.7% by weight
Verified
23Global plastic waste: 46% single-use packaging
Verified
24Food packaging plastics 15%, consumer goods 12% in global plastic waste
Directional
25Industrial waste in US: metals 23%, minerals 20%, organics 15%
Single source
26US MSW durable goods 17.6%, nondurable 13.7% in 2018
Verified
27Containers and packaging 28.1% of US MSW in 2018
Verified
28Global food waste composition: 60% avoidable, 26% potentially avoidable, 14% unavoidable
Verified

Waste Composition Interpretation

While our paper mountains stubbornly refuse to recycle themselves, the world's true garbage crown belongs to the organic banquet we insist on throwing straight into the bin.

Waste Generation

1In 2016, the world generated 2.01 billion tonnes of municipal solid waste, with East Asia and Pacific region producing the most at 468 million tonnes
Verified
2High-income countries generate 34% of global MSW but only 16% of world population, averaging 728 grams per capita per day
Verified
3Low-income countries generate 93 grams per capita per day of MSW, projected to rise to 156 grams by 2050
Verified
4The United States generated 292.4 million tons of municipal solid waste (MSW) in 2018, or 4.9 pounds per person per day
Directional
5In the EU-27, total waste generation excluding major mineral wastes was 2.7 billion tonnes in 2020
Single source
6China generated about 210 million tonnes of MSW in 2019, making it the largest producer globally
Verified
7India produced 62 million tonnes of MSW in 2021, expected to reach 165 million tonnes by 2030
Verified
8Japan generated 41.8 million tons of general waste in fiscal year 2021
Verified
9Brazil generated 78.3 million tonnes of MSW in 2019
Directional
10In 2022, the UK produced 27.2 million tonnes of household waste
Single source
11Australia generated 76 million tonnes of solid waste in 2020-21
Verified
12South Africa produced 122 million tonnes of general waste in 2022
Verified
13Nigeria generates about 32 million tonnes of solid waste annually
Verified
14Global construction and demolition waste accounts for 35% of total solid waste
Directional
15In 2019, the US generated 42.1 million tons of steel scrap from manufacturing and industrial processes
Single source
16Europe's industrial waste generation totaled 2.9 billion tonnes in 2020
Verified
17Global e-waste generation reached 62 million tonnes in 2022
Verified
18Food waste globally amounts to 1.05 billion tonnes per year
Verified
19Plastic waste generation worldwide was 353 million tonnes in 2019
Directional
20In 2020, the US food supply chain generated 66 million tons of food waste
Single source
21Global plastic packaging waste reached 141 million tonnes in 2015
Verified
22E-waste in Europe generated 6.2 million tonnes in 2022
Verified
23India's plastic waste generation was 3.4 million tonnes in 2018-19
Verified
24US hazardous waste generation was 35.2 million tons in 2020
Directional
25Global medical waste surged by 25% during COVID-19 peak in 2020
Single source
26Agricultural waste in India is 500 million tonnes annually
Verified
27Worldwide, 2.24 billion tonnes of MSW was generated in 2020
Verified
28Sub-Saharan Africa generated 95 million tonnes of MSW in 2016
Verified
29Middle East and North Africa produced 132 million tonnes of MSW in 2016
Directional

Waste Generation Interpretation

The planet has become a conveyor belt of our own making, where the wealthiest nations demonstrate a staggering mastery of the "disposable" lifestyle while the rest of the world scrambles to catch up to our wasteful standards, a toxic race with no finish line.

Waste Management

1In the US, 24% of municipal solid waste was recycled in 2018, totaling 69.9 million tons
Verified
2Composting accounted for 8.5% of US MSW management in 2018, 24.9 million tons
Verified
3Landfilling disposed of 50% of US MSW in 2018, 146.1 million tons
Verified
4Combustion with energy recovery managed 12.5% of US MSW, 36.5 million tons in 2018
Directional
5Globally, only 13.5% of food waste is recycled or composted
Single source
619% of global MSW is recycled, 5% composted, 48% landfilled
Verified
7In the EU, 48% of MSW is landfilled, 25% recycled, 17% incinerated in 2020
Verified
8Germany's MSW recycling rate is 67.7% in 2021
Verified
9Japan recycles 20% of MSW, incinerates 80% with energy recovery
Directional
10South Korea has 59% MSW recycling rate in 2021
Single source
11China landfilled 52% of MSW, recycled 26%, incinerated 22% in 2019
Verified
12India's MSW treatment: only 70% collected, 31 cities have waste-to-energy
Verified
13Only 9% of plastic waste is successfully recycled globally
Verified
14E-waste formal recycling rate globally is 22.3% in 2022
Directional
15US paper recycling rate 68.2% in 2018
Single source
16Steel recycling rate 54% in US construction waste
Verified
17EU municipal waste recycling rate reached 48.7% in 2021
Verified
18UK household waste recycled or composted 45% in 2022
Verified
19Australia's national waste recovery rate 64% in 2020-21
Directional
20Brazil recycles only 1.4% of MSW, landfilled 58.4%
Single source
21Africa recycles less than 10% of MSW, mostly informal sector
Verified
22Global incineration capacity needs to triple by 2050 for waste management
Verified
23US hazardous waste treated or disposed: 94% in 2020
Verified
24Landfills worldwide receive 37% of plastic waste, 12% incinerated, 49% mismanaged
Directional
25Food waste composting in EU is 15% of biodegradable waste
Single source
26US recycling rate for aluminum cans 50% in 2022
Verified
27Global paper recycling rate 59.9% in 2021
Verified
28Glass recycling in US 31% in 2018
Verified

Waste Management Interpretation

Our recycling efforts are like a leaky bucket: while we pat ourselves on the back for the quart we've saved, we're still casually pouring half the contents straight into the ground.

Sources & References