Humans are very resourceful and well endowed. But our major problem is that we constantly tend to overdo things which usually result in our causing environmental hazards to the ecosystem.
I used to think the King Cobra was the deadliest snake but was jolted when I stumbled on some articles on snakes. I got to realize that the Inland Taipan was far more deadly. The snake can release about 100-200 mg of venom from one bite and that was enough to kill one hundred six foot tall humans.