What is the single most significant barrier to widespread use of alternative energy? Is it the right wing climate change skeptics? No. It’s economics. If there is not money to be made at the same scale as in the fossil fuel industry, and if renewable, clean energy does not become cheaper than fossil fuels, alternative…

A vast network of under-sea volcanoes pumping out nutrient-rich water in the Southern Ocean plays a key role in soaking up large amounts of carbon dioxide, acting as a brake on climate change, scientists say. A group of Australian and French scientists have shown for the first time that the volcanoes are a major source…