Proposed legislation could reduce the city’s total carbon output by 5 percent.
Environmental ‘derivatives’ encourage creative, proactive conservation.
Conservation land in Mexico and a desalting plant in Arizona are at the center of a debate over the river.
The president called for tougher fuel-efficiency standards Monday and may let states regulate vehicle emissions of greenhouse gases.
Agencies can’t agree on a definition, which hobbles preservation efforts.
Together with earlier moves, 355,000 square miles of islands, reefs, and atolls now have new safeguards.
Its new emissions plan aims to cut each Californian's carbon 'footprint' from 14 tons to 10 tons a year by 2020.