Latest posts in Science Matters
The shift from fossil fuels to renewable energy is occurring mainly at the power plant level. But what about transportation? Can we significantly reduce greenhouse gas emissions by switching to cleaner fuels? Or is this just an attempt to keep 20th century technology chugging along while trading one set of environmental problems for another?Continue reading »
Industrial activity has profoundly affected the Blueberry River First Nations in northern B.C. A recent Atlas of Cumulative Landscape Disturbance, by the First Nations, the David Suzuki Foundation and Ecotrust, found 73 per cent of the area inside its traditional territory is within 250 metres of an industrial disturbance and 85 per cent is within 500 metres.
In other words, in much of the territory, which once supported healthy moose and caribou populations, it's difficult if not impossible to walk half a kilometre before hitting a road, seismic line or other industrial infrastructure. Local caribou populations are threatened with extinction mainly because of habitat disturbance caused by industrial activity and ensuing changes to predator-prey dynamics.Continue reading »
People have harnessed energy from moving water for thousands of years. Greeks used various types of water wheels to grind grain in mills more than 2,000 years ago. In the late 1800s, people figured out how to harness the power to produce electricity. Throughout the 20th century and into the 21st, hydropower has expanded, producing about 17 per cent of the world's electricity by 2014 and about 85 per cent of renewable energy — and it shows no signs of slowing.Continue reading »
Feeding more than seven billion people with minimal environmental and climate impacts is no small feat. That parts of the world are plagued by obesity while starvation is rampant elsewhere shows part of the problem revolves around distribution and social equity. But agricultural methods pose some of the biggest challenges.Continue reading »
We’re living in a time of records. More renewable energy came on stream in 2015 than ever — 147 gigawatts, equal to Africa’s entire generating capacity — and investment in the sector broke records worldwide. Costs for producing solar and wind power have hit record lows. Portugal obtained all its electricity from renewable sources for four straight days in May — the longest achieved by any country — and Germany was able to meet 90 per cent of its electricity needs with renewable power for a brief period. Clean energy employment and job growth now outpace the fossil fuel industry by a wide margin.Continue reading »