What is a sharks environmental pressures?

Historic environmental pressures, predatory pressure, climate and chemistry change, perils of pollution, and pushing back

Sharks have a lack of food and it's being hunted. " Also being savagely massacred by the human race." We, people, need to have the existence of sharks in our hands. People don't care about sharks. Many people think that they are dangerous. Life as we know it! 

Aneutral atom must have the same number of neutrons and protons? no, they must have the same number of protons and electrons

1. aspect is nothing really because the answer is right in front of your face