Daily Roundup: February 18, 2011

Immunity Challenge: State legislators are considering a bill that would make Kentucky a "sanctuary state" exempt from EPA regulations. Bloomberg and Lexington Herald-Leader

Worthy Tradeoff? Researchers found that young children living in public housing spend more time playing outside than other urban kids. Science Daily

A Little Help? Saudi Arabia asked the U.N. for financial help to shift to a clean-energy economy. The U.N. recently created a $100 billion fund to help poor nations adapt to climate change. Reuters

Let It Pour: A proposed bill would give California landowners the right to collect rainwater for both outdoor and indoor (non-potable) use. TreeHugger

Game Over: A football fan was charged with criminal mischief for poisoning Auburn University's 130-year-old live oaks. Atlanta Journal-Constitution and Ecorazzi

--Della Watson