New finds from Oregon and Chile support the idea that they arrived 3,000 years earlier than previously thought.
Repairs will cost trillions. Public pension funds can help pave the way.
The state aims to tap its 325 sunny days a year, but loss of an energy tax credit threatens its big plans.
A panel discussion Tuesday in Doha, Qatar, was dominated by the perception that the Western media hypes up tensions by focusing too much on the minority of radicals.
A record infestation of beetles is turning western Canada's forests from a carbon sink into a CO2 source.