There have been 5 major extinction events throughout history, are humans impacting the 6th? Why or why not?

The biologists have been researching and they have been loosing 30,000 species per year. there is little doubt that humans are the direct cause of ecosystem stress and species destruction in the modern world through such activities. The transformation of landscape , overexploration of species, pollution, and the introduction of the alien species are the human activities occuring. Began when the first modern humans began to disperse to different parts of the world about 100,000 years ago. The humans of this world are causes of the sixth extinction because they kill animals that have a large amount species but those species are getting lower and lower. Humans are one of the causes for the extinction becausee the lower the amount of species 30,000 per year.
http://www.actionbioscience.org/newfrontiers/eldredge2.html