ARCTIC MELTING: Exclusive: No ice at the North Pole: Polar scientists reveal dramatic new evidence of climate change

BIOFUELS: Biofuel feedstocks latest candidate: Kudzu, Biofuel future threatened by severe weather

CARBON: California air board announces plan for carbon-credit trading: The agency’s proposal would slash greenhouse emissions to 1990 levels. But it has a long way to go.

CLIMATE CHANGE: Climate change threatens penguins

COLONY COLLAPSE DISORDER: House panel probes honeybee disappearances

CONSERVATION: Rocky Mountain conservation land deal tops $500 million, largest of its kind

ECO-DATING: Vegetarian singles go green eco-friendly organic dating

ENERGY: Solution, or mess? A milk jug for a green earth

ETHANOL: Crop prices shutting down ethanol plants and plans

FLORIDA EVERGLADES: U.S. sugar to sell land to Florida for Everglades renewal

FRESHWATER DOLPHINS: Irrawaddy dolphin numbers take a dive

GEOTHERMAL ENERGY: US Department of Energy to invest $90 million in advanced geothermal research

OIL: Costs hit drive for more oil refineries

PHEV: VW to join Toyota, GM with 2010 plug-in hybrid

SOLAR: Hawaii requires solar water heaters for new homes, Citing need for assessments, U.S. freezes solar energy projects

WATER POLLUTION: Olympic nightmare: A red tide in the Yellow Sea

WILDFIRES: Wildfires force firefighters to pick their battles, Slow progress made fighting smoky NorCal fires, Google map of major NorCal fires, Interactive Google map of major NorCal fires