This was first published at Corporate Knights. I have added in this re-post some footnotes with details of calculations along with comments and references below the main article. I have also done a rough estimation of the emissions associated with the addition of one 18 million tonne per year LNG project (excluding end-use emissions) and the effect that this will have on BC’s emissions targets.
Photo by Jesús Rodríguez Fernández (creative commons)
The push by British Columbia to develop a new liquefied natural gas (LNG) export industry raises questions about the impact such activities would have on greenhouse gas emissions, both within the province and globally.
One of the single most important factors relates to the amount of methane and carbon dioxide that gets released into the atmosphere, either deliberately through venting or by accident as so-called fugitive emissions. Fugitive emissions are the result of valves and meters that release, by design, small quantities of gas. But they can also come from faulty equipment and from operators that fail to follow regulations.
According to the B.C. Greenhouse Gas Inventory Report 2012, there were 78,000 tonnes of fugitive methane emissions  from the oil and natural gas industry that year. B.C. produced 41 billion cubic metres of gas in 2012 . This means about 0.28 per cent of the gas produced was released into the atmosphere .
By North American standards, this is a very low estimate. The U.S. Environmental Protection Agency (EPA) uses a figure of 1.5 per cent leakage , more than five times higher. Recent research led by the U.S. non-profit group, Environmental Defense Fund (EDF), shows that even the EPA estimates may be too low by a factor of 1.5 . B.C.’s estimate, in other words, would be about one-eighth of what has been estimated for the American gas industry.