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Global impacts of food waste


How much food is wasted?


The global volume of food wasted per year is estimated to be 1.3 Gtons. This can be compared to the total agricultural production (for food and non-food uses such as textile fibers, energy crops of medicinal plants), which is about 6 Gtonnes.

According to Practice Greenhealth's Sustainability Benchmark Report, hospitals generate over 29 pounds of waste per staffed bed per day; about one-third of healthcare's waste is comprised of food.  


Where and how does food waste mostly occur?


Waste happens at all steps of production, handling, storage, processing, distribution and consumption.  Agricultural production is responsible for the greatest amount of total food waste volumes, 33% of the total.  Waste occurring at the consumption level is much more variable, with waste in middle and high-income regions at 31–39%, but much lower in low-income regions, at 4–16%.


What is the impact of food waste on greenhouse gas emissions and climate?


Without accounting for GHG emissions from land use change, the carbon footprint of food produced and not eaten is estimated to 3.3 Gtons of CO2-equivalent. For a sense of scale, when considering the total emissions by country, only the USA and China are responsible for more emissions.


What is the water footprint related to food waste?


Globally, the consumption of surface and groundwater resources of food waste (the so called blue water footprint) is about 250 km³, which is equivalent to 3.6 times consumption of the USA for the same period.  Animal products in general, have a larger water footprint per ton of product than crops. This is one of the reasons why it is more efficient to obtain calories, protein and fat through crop products than through animal products.


What is the impact of food waste on land use?

At world level, in 2007, the total amount of food waste represented the consumption of 1.4 billion hectares of land, equal to about 30 % of the world’s agricultural land area, and larger than the surface of Canada. Low-income regions account for about two-thirds of this total. The major contributors to land occupation are meat and dairy products, with 78% of the total, whereas their contribution to total food waste is 11%.


Land degradation is also an important factor of food waste. Most of the food waste at the agricultural production stage is in regions where land degradation is already present or where the soil is already in poor shape, thus adding undue pressure on the land.


What is the impact of food waste on biodiversity?


Agricultural production, in particular food crops, is responsible for 66% of threats to species in terrestrial systems.  In the case of marine biodiversity, countries are “fishing down the food chain,” with fish catches increasingly consisting of smaller fish that are lower in the food chain, and at a higher rate than the ability of the fish stocks to renew. Any waste depletes the resources even faster.


What is the economic impact of food waste?

On a global scale, about USD 750 billion worth of food was wasted in 2007, the equivalent of the GDP of Turkey or Switzerland.  This value a low estimate since it mainly considers producer prices and not the value of the end product.

US EPA has developed tools for assessing food waste and the food reduction challenge.  Start your food waste reduction program today! Feel free to contact us for assistance.  


more healthcare environmental resources

Healthcare Environmental Resource Center




HERC provides pollution prevention and environmental compliance assistance information for the healthcare sector. It is intended to be a comprehensive resource, covering all the varieties of hospital wastes, and all the rules that apply to them, including both federal regulations and the specific rules that apply in your state. HERC also includes environmental compliance information for dental offices and assisted living/nursing care communities.

Healthcare Without Harm

Together with our partners around the world, Health Care Without Harm shares a vision of a health care sector that does no harm, and instead promotes the health of people and the environment.

 To that end, we are working to implement ecologically sound and healthy alternatives to health care practices that pollute the environment and contribute to disease.

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The MPCA's healthcare pages contain hazardous waste, including pharmaceutical compliance, wastewater regulatory guidance and links to local compliance resources. 

MnTAP is an outreach and assistance program that helps Minnesota businesses develop and implement industry-tailored solutions that prevent pollution at the source, maximize efficient use of resources, and reduce energy use and costs to improve public health and the environment.


Practice Greenhealth is the source for environmental solutions for the healthcare sector and lends support to create better, safer, greener workplaces and communities.

go to the Wisconsin DNR homepage

Wisconsin Department of Natural Resources (WI DNR) Healthcare

Recycling & waste reduction: a guide for Wisconsin healthcare 

This guide will help healthcare facilities meet Wisconsin’s recycling law requirements and reap the benefits of applying the waste hierarchy of reduce, reuse and recycle. Paying attention to waste pays off because disposal fees, lost resources, energy costs and environmental costs add up quickly.

Additional regulatory and other guidance at WI DNR's healthcare pages.  


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