Litter The last city of Toronto audit of litter across the city, in 2006, found six plastic bags out of 4,341 items. That’s 0.14% by item. By weight, the percentage would be less.
Waste The 450 million plastic bags Mr. Smith mentions is a 2008 number. The city says the current number of bags is now estimated at about 215 million (the science of calculating this is something else). But even the 450 million-bag total, at about six grams per bag, works out to 2,600 tonnes. As a percentage of the city’s estimated 800,000 tonnes of waste, plastic bags would account for 0.3%. If all plastic bags were eliminated — an impossibility given their necessity as garbage-bin liners and other uses — Toronto’s waste stream would be essentially unchanged. Not a penny will be saved, and costs would likely go up under complications brought on by the ban.
Environment Numerous comprehensive studies by people who are as green or greener than Mr. Smith suggest plastic bags are better than the alternatives — whether paper or cloth. Plastic is less polluting and toxic than paper and cotton,
according to a 2011 U.K. Environment Agency report. As for global warming, a cloth bag would have to be reused 327 times, and a paper bag nine times, to match the low warming impact of a high-density polyethylene bag that’s reused as a garbage-bin liner.
That’s science, official green science.
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