If people are to drive less it only means fewer carbon dioxide emissions because people will save on gasoline. Similarly, it helps keep around 20 pounds of carbon dioxide out of this atmosphere thus reducing the amount of greenhouse gases. Clearly, car related emissions are the major cause of global warming.
Change a light. Replacing one regular light bulb with a compact fluorescent light bulb will save 150 pounds of carbon dioxide a year.
Recycling helps reduce greenhouse gas emissions by reducing energy consumption. Using recycled materials to make new products reduces the need for virgin materials. This avoids greenhouse gas emissions that would result from extracting or mining virgin materials.