O?Malley: Global warming a threat

Gov. Martin O?Malley and Virginia Gov. Timothy M. Kaine called on Congress Wednesday to pass legislation to control greenhouse gas emissions, arguing the health of the Chesapeake Bay is at stake.

“We now know with certainty that human activities ? including coastal development, the burning of fossil fuels and increasing greenhouse gas emissions ? are contributing to both the causes and consequences of climate change,” O?Malley told the Senate Environment and Public Works Committee.