About 4,000 oil platforms
lots
Marine science is the study of oceans and ocean biota. To the extent off shore oil drilling platforms have an effect on oceans and ocean life, marine science might incorporate that. For the most part, oil mining is considered a geologic science.
Barnacles can grow on oil platforms. The platforms can be beneficial to sea life, as long as there is no oil spill. Once there is an oil spill, then the harm greatly outweighs any benefit.
Enough to make a giant bottle of KY Jelly
Oceans are threatened by oil digging and endangered animals.
Industries and individuals.
Africia
yes
digging up oil.
The rigs and platforms in the North Sea
Many things that we do now are affecting the oceans. Some of them are that nuclear waste is thrown into the oceans and so is sewage in the third world countries. Oil from ships also affect the color and smell of sea water.