How Intelligent Are We?

What if everything we think of as human intelligence is not really intelligent at all? What if we turn out to be one of the most ignorant species on our planet? Think about it. Isn't intelligence ultimately a measure of our ability to understand our environment and then use said understanding to propagate our existence? If so, then clearly humans are pretty dumb after all. We are destroying this planet with a voraciousness rivaled in nature only by malignant cancer. How intelligent is that?