In an article about threats to the Ontario environment, Enzo Di Matteo has mentioned these points about shale gas –
What the fracking?
Shale gas exploration, which involves the extraction of natural gas from rock using water, sand and chemicals in a method called hydraulic fracking, or hydrofracking, is in its infancy in Ontario.
But a three-year study by the Ministry of Northern Development and Mines uncovered areas of potential development in almost all of southwestern Ontario west of London and a section of southeastern Ontario. One exploratory well has been drilled in Chatham.
While its full potential has yet to be determined, natural gas currently accounts for about 30 per cent of Ontario’s energy.
The harmful effects of fracking on the environment, however, are well known from experience in the U.S. These include huge stresses on water supply (approximately 11 million litres of water are required for each drilling site) as well as water contamination and chemical exposure
Those points are part of an annual report from the Environmental Commissioner.