Green Fridays, sponsored by the Sierra Club Northern Alameda County Group, is a series of public presentations by expert speakers on the most important environmental issues of our times. Meetings are held at the Bay Chapter Office, 2530 San Pablo Avenue (one block south of Dwight Way) in Berkeley on the second Friday of each month. Note new format: no potlucks. Doors open at 7:00 p.m.; beverages and snacks will be served. The presentation begins at 7:30 p.m. Suggested donation is $3.00. For more information, contact Ken Peterson at: [masked] or Joanne Drabek at [masked]-4614. This month's lecture, Feb. 14, is entitled "Climate Risk, Sustainability, and Global Policy Dialog". Average temperatures in the Earth’s atmosphere have begun an upward trend that is largely irreversible over the next century. Whether these trends lead to moderate or extreme climate change will depend on policy. In this talk, learn about the risks we face around the world, as well as the state of policy dialog on how to mitigate climate change and its associated impacts. Our speaker will be David Roland-Holst, Professor of Agricultural and Resource Economics, who is a leading authority on economic, energy, and climate policy modeling. Most recently, his research has been central to California’s groundbreaking Global Warming Solutions Act. He has held academic posts in the United States, Europe, and Asia. He has conducted research in more than 40 countries, working with institutions such as the Asian Development Bank, World Bank, and several United Nations agencies, as well as governments in Asia, Latin America, Europe, Africa, and United States.