Dr. Erango Kelbisow (right), science teacher at Middle College School in South Los Angeles, blows CO2 into a cup causing the acid base indicator in water to change color as his colleague teacher Dayna Haray from the same school watches. This process mimics acidification caused by increased CO2 in the air related to climate change. Both teachers were participating in the first of three eight-hour sessions in the Environmental Teacher Institute held at LADWP headquarters in downtown. LADWP, Metropolitan Water District, the Calif. Dept of Water Resources and the Calif. Environmental Education Foundation sponsor the training. (Photo courtesy LADWP/Chris Corsmeier.)