Why Zero-Waste?
We all generate waste every day, but we don’t always stop and think about how much waste we generate, where it goes when we are finished with it, and the broader impact it has.
Reducing the number of products we consume and dispose of is an essential part of social, environmental, and economic sustainability.
McGill’s Zero-Waste Knowledge Base is a resource to help you understand the important impact of waste, learn what McGill is doing to become zero-waste and rethink your consumption and waste sorting habits.
Environmental Impact of Waste
Disposing of waste, through dumping in landfills or incineration, contributes to climate change, pollution, and environmental degradation. As materials decompose in landfill, large quantities of carbon dioxide and methane are released into the atmosphere, adding to global warming.
Methane is a powerful and potent greenhouse gas that has 86 times more global warming potential than carbon dioxide over a 20-year period. According to Environment and Climate Change Canada, 23 percent of Canada’s methane emissions come from waste.
What we throw away also has more immediate impacts on the health of our planet and people. What we throw away also has more immediate impacts on the health of our planet and people.
Landfills can lead to the contamination of soil and water through leachate, when rainwater leaches and draws out chemicals and contaminants when in contact with waste. This endangers ecosystems and the health of communities. Sending waste to landfill also creates additional air pollution, which lowers the quality of the air we breathe.
Litter that is not properly disposed of is another large issue that contributes to environmental degradation. Plastic makes up to 90 percent of marine debris and trash which can cause suffocation, starvation, and drowning for marine life.
When plastics break down in the ocean, microplastics, which are plastics under 5 mm in size, are produced and make their way into water and food sources for humans and animals. Not much is known about microplastics and their impacts yet, but it is a growing concern.
Social Impact of Waste
Waste disposal also has important social impacts that should not be ignored.
We know that landfills and incineration of waste can be detrimental to human health through the air, water, and soil pollution, but other negative impacts include noise, smell, and smoke.
There are also environmental justice implications for waste disposal. Property values near landfills are lowered because of these negative impacts. Moreover, landfills are more often located in neighbourhoods with a higher proportion of low-income and minority populations which is an example of environmental racism.
An example of environmental racism in Quebec is the large quantities of unidentified construction waste brought from large cities to Kanehsatà:ke, amounting to the equivalent of 160 Olympic-sized swimming pools. This has resulted in toxins being released near the community, threatening the health of people living nearby and local biodiversity.
Learn more about waste-related contamination in Kanehsatà:ke