Though we may not be able to detect it on a day-to-day basis, climate change has come to the Bay Area and is already leaving its mark on local ecosystems: rising tides in the Bay, increasingly severe wildfires, acidification of ocean waters. While it may be too late to avoid global warming’s early stages, there is a lot we can do to both understand and mitigate its impacts on our landscapes and watersheds. With the support of world-class research institutions and an active environmental movement, Bay Area scientists are taking the lead in this crucial effort.