Grades of Green Board Member and Director of the Water Program at the NRDC, Steve Fleischli, will speak on May 13th at the Hammer Museum at 7:30 on the threats to the world’s rivers and what we can do to protect them. River ecosystems have become some of the most endangered places on Earth. Growing human populations, as well as agriculture and industry, are all placing increasing demands on limited water supplies while climate change is exacerbating drought and reducing snow fall conditions. Learn more about the event and watch the live stream here.