There are natural oil spills in the ocean when oil seeps through cracks in the ocean floor. They can be quite large and are pretty common. It happens often off the coast of California.
The La Brea tar pits are an ecological catastrophe.
We must remove all that oil from the ground and burn it to protect the environment
I swear Gulf oysters were bigger and tastier after the Deep Water Horizon blowout. The gulf biosphere literally ate the oil.