H.I.P.P.O.

Habitat Destruction
Invasive Species
Population Explosion
Pollution
Overconsumption

In my girlfriend's Entomology class, she learned about H.I.P.P.O, which stands for the above. HIPPO is an acronym for things that are occurring that are not only destroying species of animals, and plants, but also the earth.
Habitat destruction affects the creatures on this earth, and ultimately, humans. If we continue to cut down trees and dig for fossil fuels, we continue to destroy habitats of animals. The animals whose habitats we have destroyed usually come into OUR habitat. An example of this would be Coyotes, who have been run out of their habitats, and into ours, and have begun eating pets and attacking children.
Invasive Species, such as the Asian Longhorn Beetle, are species that are not native to the area, but once they have arrived there, they basically take over. They have no enemies, and will continue to consume and consume until they have completely destroyed another creature's habitat. The Asian Longhorn Beetle arrived in America from China during transport of bananas. These creatures are now all along the east coast, destroying our trees.
Population Explosion is what humanity does best, create more and more children until we run out of room. Due to our explosion of population, we are using more and more resources.
Pollution is self-explanatory. We are harming and polluting the earth with our constant use of resources, and items that cannot be biodegradable.
Overconsumption is the last letter, and basically once again refers to humanity's constant over consumption of everything. We eat too much food, and use too many fossil fuels.

A video of Edward Wilson's speech on HIPPO: