Causes and Consequences The Greenhouse Effect Causes and Consequences

Global Warming 1. We add >6 billion tons of CO2 to the atmosphere every year.    2. Only 1% of this CO2 can be recycled by the entire photosynthetic capacity of the Earth. 3. Most methane production is due to man-related activities. 4. Atmospheric temperatures, previously constant for over a millenium, are measurably higher than in 1980. 5. There has been no increase in solar yield.     6. Human activities are responsible for this global warming.