Since humans right now are very wasteful. With burning fossil fuels and polluting the air. When humans go extinct, plants and other animals will not only continue to exist. They will thrive. According to Ashley K from keystonespring2010.blogspot.com "The removal of our species may determine the dramatic shift of an ecosystem, which is the partial definition of a keystone species but we are most certainly not a species that plays a critical role in maintaining the structure of an ecological community. After we “leave”, the land will repair its wounds and forget us, just as we forgot it.