The goal was to check if making biofuel from corn leftovers in Quebec is good for the environment. They looked at everything from when the leftovers are picked to when they reach the biofuel factory. They checked how much energy is used and how many greenhouse gases are made. They saw that collecting 15% of the leftovers Is the best. The way they pick the leftovers and how they split the costs also matter a lot. If they collect all the needed leftovers in Quebec, they could make all the biofuel they need. But doing this might cause more greenhouse gases and hurt the soil.