Q: What's a sucker?

A: Anyone who regularly buys a bottle of water.

Like most 21st Century women, Laurie David tends to keep a pretty full schedule—she's a mother, she's a wife (to Curb Your Enthusiasm's Larry David), she has a demanding career. And she's saving the world.

Well, that last one is only partially true. She'll be the first to tell you that saving the world is a job for all of us, and it can't be done by a single person. Nonetheless, it seems that she picks up more than her fair share.

Do celebrities live up to their green ambitions? LIME investigates every Friday.

A new report finds that many of our beaches are dirty, dangerous and hazardous to one's health. 

I'm not sure I wanted to know that.

Twelve national parks in the West are under serious threat from climate change. That’s the message of a new report from the NRDC and the Rocky Mountain Climate Organization, “Losing Ground.” According to the report, the parks in 11 western states are “endangered” as a result of climate change-related phenomena including drought, decreased snowfall, and wildfire. The report says landscapes in these national parks could be “drastically altered” if nothing is done to stave off the potential impacts of global warming. (An RMCO report released last summer showed western temperatures on the rise and snowflakes in decline.)

Environmentally conscious beauty company Aveda has partnered with eco-fashion leader Project Alabama to unify Kirstin Dunst, Jessica Alba, Avril Lavigne, Susan Sarandon, Le Ann Rimes, Carmen Electra, Naomi Watts, and many, many others. The last time this much talent worked on one project was a surprise birthday party for Kevin Bacon, but how could any of them have said no to a fun project that raises money for the NRDC? Handbags for the Earth has the celebs autographing and decorating bags that are available for purchase on Ebay. The auction ends a week from today, so place your bid ASAP.

Emissions of two air pollutants from the U.S.'s largest electricity generators have fallen since 1990, while emissions of carbon dioxide, the most significant human-caused greenhouse gas, have been steadily rising, according to new research. A report issued by the environmental nonprofit NRDC, the sustainable investment group Ceres, and the utility Public Service Enterprise Group (PSEG), found that government regulation of nitrogen oxides (NOx) and sulfur dioxide (SO2) helped significantly reduce emissions of the pollutants. CO2 is not subject to government regulation.