Here is my argument, for arguments sake.

I hear this all the time. Humans caused this and humans caused that and since humans did it, it isn't natural.

I'm sorry, but I am not under the impression that humans are aliens and came to earth just to screw it up. I believe that we have a right to be here, just like all of the plants and animals of this world. Now that doesn't mean what we do to our precious marble isn't destructive, but it is indeed a NATURAL occurrence. The things we do are just as natural as a giraffe taking a dump on the savannah.

Just because humans were involved in the transportation of a species to a new environment does not mean that occurrence wasn't natural. Everything humans have done have been possible because of what the earth has given us. Nothing more. Humans are part of the ecosystem as well, whether you like it or not. I'm not saying what we have done is RIGHT, but it is in fact NATURAL.

That is, unless you all think we are ALIENS!!!