1. Causes and Consequences
The Greenhouse Effect
Causes and Consequences

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