Climate Change 101, Part 1, Segment 2 – Getting right back to it, we go in to atmospheric CO2 levels, CO2’s effects on plants, humans, and animals is discussed in depth, CO2’s effect on freshwater and saltwater is also examined. We also look closely at coral bleaching, inland and coastal algae blooms, CO2’s effect on soil erosion and degradation, and how deforestation adds to the climate change problem.