Luke:
Here's a study that shows paper bags to be much inferior to plastic from an environmental point of view.
Sam
B. Waste, Energy Consumption, Greenhouse Gas Emissions
The evidence does not support conventional wisdom that paper bags are a more
environmentally sustainable alternative than plastic bags. While this is certainly
counterintuitive for many people, relevant facts include the following:
1. Plastic bags generate 60% less greenhouse gas emissions than uncomposted
paper bags, and 79% less greenhouse gas emissions than composted paper bags.
The plastic bags generate 3,097 tons of CO 2 equivalents per 100 million bags;
while uncomposted paper bags generate 7,621 tons, and composted paper bags
generate 14,558 tons, per 100 million bags produced. 4
2. Plastic bags consume less than 4% of the water needed to make paper bags. It
takes 5,527 cubic meters of water to produce 100 million plastic bags, versus
145,729 cubic meters of water to produce 100 million paper bags. 5
3. Plastic grocery bags consume 40% less energy during production and generate
80% less solid waste than paper bags. 6 Significantly, even though traditional
disposable plastic bags are produced from fossil fuels, the total non-renewable
energy consumed during their lifecycle is no greater than the non-renewable
energy consumed during the lifecycle of paper and biodegradable plastic bags. 7
4. Paper sacks generate 70 percent more air, and 50 times more water pollutants,
than plastic bags. 8
5. It takes 91 percent less energy to recycle a pound of plastic than it takes to
recycle a pound of paper. 9
6. After three uses, reusable plastic bags are superior to all types of disposable
bags --paper, polyethylene and compostable plastic -- across all significant environmental indicators. 10
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