It takes just 10 -15 minutes to get a rough estimate of your carbon footprint by entering information off the top of your head. To refine this estimate using information from farm records can take longer, about 30-60 minutes, but this will become easier and more efficient with each new assessment. Often the most time consuming part is looking up and estimating the exact kWh and fuel for the given crop from all your electricity and fuel bills. After completion, you may also wish to spend some time exploring options for reducing GHG emissions and making a plan.