Driving is one of the primary ways in which we contribute to climate change. By replacing your vehicle with one that is substantially more fuel-efficient, you can avoid a lot of CO2.
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Refer to the <i>Low Carbon Diet </i>book (Action 18: Befriend an Earth-Smart Auto) for a chart that you can use to calculate how much CO2 you will save with a more fuel-efficient vehicle. 
<br><br>When you have replaced your vehicle with a more efficient one, figure out the CO2 savings and enter that number below.