Nearly 500 million tons of coal are strip mined annually, providing 43 % of the nation's coal, more than any other region. (wildearthguardians.org)
North American motor vehicle exports have averaged growth of 3.5 per cent annually over the past decade, faster than other regions. (canadianbusiness.com)
As a result, they produce 30 percent of the country's pollution and average emissions were five times higher than other regions. (scientificamerican.com)