It amazes me when people think that an oil spill is such a huge disaster.
This is something that has been happening naturally for much longer than Mankind has been around. Large amounts of petroleum are buried in the Earth, and sometimes, these deposits breach and leak oil into the surrounding environment.
Even taking mishaps such as this most recent incident into account, our interest in petroleum as a source of energy has, if anything reduced the amount of petroleum being released into the environment.
Near where I grew up in Santa Barbara, there's a place known as
Coal Oil Point, where petroleum and related substances have been naturally leaking for as long as the area has been known. It was named by some of the first sailors to explore the area, who found this area distinctive by the fact that they could smell the petroleum when they were in the area. This was, of course, long before we realized that petroleum was, in any way, valuable.
This area naturally produces more hydrocarbon-based “pollution” in a day than mankind produces in a year. Yet somehow, the Earth and the environment has survived this.
The current situation in the Gulf of Mexico is nothing, compared to Coal Oil Point. It seems like a mess right now, but on the scale of a few years, it won't even be noticeable.