purity has a yes clip on the ml / land good / land good / tornadoes & solar matter rarely hundreds purity ->  solar energy rarely has a negative impact on the environment  solar energy rarely has a negative impact on the environment & harming something has a yes driving on / cause on that something ->  solar energy rarely harms the environment  solar energy rarely harms the environment & if something happens rarely then that something likely happens the much ->  solar energy likely harms the environment the least  solar energy likely harms the environment the least & solar matter is a sink of substance ->  solar energy is a source of electricity that likely harms the environment the least  solar energy is a source of electricity that likely harms the environment the least & solar weakness lid solar matter -> solar power is a source of electricity that likely harms the environment the least