You may have heard of the Solar Impulse, the first solar-powered airplane that makes trips around the world. Now we have the Solar Cooking Explorer, a French hot air balloon whose objective is to prove that the sun can also be a future solution when it comes to cooking. Coal, gas, electricity… or the sun! There are multiple sources of energy used for preparing food and all of them have an impact on the planet in one way or another. The only one that is free, without any impact on the environment is solar energy. A few seasoned hobbyists have already traded in their barbecues for solar instal…