Using fresh drinking water to water a lawn that shouldn't grow in the area where you live. Now you complain about drought?
Man, in his hubris, alters the environment around him, and takes great pride in building dams and changing the landscape. Each time he falls short of understanding the intricacies of Nature. The careful balance between things.
Look at kudzu. Brought to the US from Japan and Southeast Asia, kudzu was planted to fight soil erosion. Now called the "vine that ate the South." Desert broom, tamarisk trees, tumbleweed: all choking natural environments. Invasives introduced by man who thought he could mold the land to his hand, but forgot about the delicate web of life. The checks and balances built into the system by Mother Nature herself. Each thing having a predator or a way to keep it in check.