Governments have repeatedly set the overall emissions cap and then left it up to the political process to allocate the available number of allowances among sources to build support for an initiative without reducing the system's environmental performance or driving up its cost.

California's goal is not merely to create linkages with foreign cap-and-trade systems, but also to inspire and cajole its own federal government, and indeed the world, to act.

Oil prices have climbed this year amid lingering tensions with Iran, with the price of gas now averaging around $3.92 a gallon -- and experts are warning more increases are on the way. Back home in their districts, legislators are using oil prices to fuel campaign rhetoric.

WASHINGTON — President Barack Obama said Wednesday he will look for ways to control global warming other than placing a ceiling on greenhouse ga...

Bruised by the health care debate and worried about what 2010 will bring, moderate Senate Democrats are urging the White House to give up now on any e...

The emerging energy policy seems fair minded, really nothing more than "user pays." But consider the unintended consequences on one of society's most disenfranchised minorities.