The Nature Conservancy's free carbon footprint calculator allows users to calculate the amount (in tons) of CO2 they emit into the atmosphere each year. Users can calculate for themselves, or for their household. There are different categories (home energy, diet, recycling, transportation) so you can see how different aspects of your lifestyle compare to other Americans. The website offers a solution: to donate to The Nature Conservancy via a carbon offset. However, if you're looking for action items and greener choices, you can learn those things while you are filling out the calculator. They have also provided a link to climate saving tips.