This is one of the comments from that page,not mine:Is this true about the chemistry?
OH NO!!!! WE'RE ALL GONNA DIE!!! Wait! Take a deep breath. Crude oil seeps into the ocean every day through fissures in the ocean floor. This is not new phenomena, but, has been going on before man inhabited the earth. The ocean is so vast, it practically is self-cleaning. After the slicks break down into parts per milions (PPM) they become inert, or, unable to cause harm. Yes, spills happen, and yes, they do suck (at first). The animals that get caught in the slicks (the oil floats on top of the water), most likely birds and fish near the top of the water, eventually die. But, like everything else in nature, the strong survive, the rest of the species will mate and produce more offspring, and the numbers will return to normal.