Well, transformation energy is something like solar power or kinetic energy. These are very useful because we do not need fossil fuels to power this energy. It is natural, so it does not harm the environment. But, some hydroelectric energy can be somewhat harmful to the environment, for if humans would make dams, they would have to sometimes do deforestation or even trap a river. So, one of the best transformation energies are wind power and solar power. Though, sometimes they cannot be that strong, transformation energy has its benefits (like providing renewable energy) and its bad effects (such as wiping out natural environment for dams and reservoirs).