Bulb is the UK's biggest green energy supplier. They provide all members with 100% renewable electricity. For every unit you use, they make sure a unit is produced and put on the grid by a renewable source including solar, wind and hydro. Plus, their gas is 100% carbon neutral. They offset the emissions from the gas they supply by supporting carbon reduction projects around the world. They're also the biggest buyer of green gas for homes in the UK so a chunk of our gas mix comes from renewable sources, like food or farm waste.