Heat and Hope: Time Running Out for Steep Emissions Cuts

The world will have to reduce emissions more drastically than has been widely predicted, essentially ending the emission of carbon dioxide by 2050 to avoid catastrophic disruption to the world’s climate, according to State of the World 2009: Confronting Climate Change, released today by the Worldwatch Institute. Yet opportunities abound in renewable energy and efficiency improvements, agriculture and forestry, and the resilience of societies for slowing and managing climate change, according to the book’s 47 authors.

“We’re privileged to live at a moment in history when we can still avert a climate catastrophe that would leave the planet hostile to human development and well-being,” (more…)

An abrupt release of methane, a powerful greenhouse gas, from ice sheets that extended to Earth’s low latitudes some 635 million years ago caused a dramatic shift in climate, scientists funded by the National Science Foundation (NSF) report in this week’s issue of the journal Nature.

The shift triggered events that resulted in global warming and an ending of the last “snowball” ice age.

The researchers believe that the methane was released gradually at first and then very quickly from clathrates–methane ice that forms and stabilizes beneath ice sheets. (more…)