The entire world production of the greenhouse gas from all the world's working fossil fuel power stations in 2012 was 14 billion tonnes. (climatechangenews.com)
He hopes keeping people informed about the diminishing sea - ice extent will help them understand humanity's role in what's causing it — the continued production of greenhouse gases. (fm.kuac.org)
As early as the 1970s, scientists began to warn that humanity's ever - increasing production of greenhouse gas emissions would change the Earth's climate. (sierraclub.ca)