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As much as half of all the food produced in the world - equivalent to 2bn tonnes - ends up as waste every year, engineers warned in a report published on Thursday.

"Most business people who struggle to get their brains around long-term sustainability find it easier to grasp if they think about their children or grandchildren. Indeed, several CEOs I have worked with have pointed to their children as a key reason why they switched on to the agenda, one or two because they were beaten up (verbally, they say) at the family breakfast table. But the capitalist system thinks otherwise. In fact my title is a direct quote from a hard-hitting quarterly investor letter released a few days ago by financial analyst Jeremy Grantham. His message is that if we proceed on current capitalist lines, "the planet's goose is cooked.""

"As a result, British Columbia's greenhouse gas emissions fell 10 percent between 2008 and 2011, as compared to a 1.1 percent decline for the rest of Canada. The carbon tax was introduced right before the recession hit in 2008, so while Gross Domestic Product (GDP) fell slightly between 2008 and 2011 in British Columbia, that change was on par with the small decline in Canada's GDP. Thus while it's inconclusive whether the carbon tax is helping or hurting British Columbia's economy, it's certainly not having the seriously damaging economic effect that alarmist opponents claim that carbon taxes will have."

"Climate change has reduced ice in the Arctic to record lows in the past year, forcing animals to range further in search of food"

"Indian PM's renewable energy ambitions are big and the country is home to Asia's biggest solar farm in Gujarat, but coal use is still increasing"

A new paper shows which companies extracted the carbon-based fuels that have caused climate change. Hover and click to explore

"The climate crisis of the 21st century has been caused largely by just 90 companies, which between them produced nearly two-thirds of the greenhouse gas emissions generated since the dawning of the industrial age, new research suggests. The companies range from investor-owned firms - household names such as Chevron, Exxon and BP - to state-owned and government-run firms."

"Beverly McGuire saw the warning signs before the town well went dry: sand in the toilet bowl, the sputter of air in the tap, a pump working overtime to no effect. But it still did not prepare her for the night last month when she turned on the tap and discovered the tiny town where she had made her home for 35 years was out of water."