Which One's Best?

To me, oceanography is the most interesting part of earth science. I also think it is the most important because of the lack of water on earth. When I go to the beach, the bright and shimmering water is one of the most beautiful sights you can see. Unfortunately, it is not always bright and blue. When the water starts churning and mixing, it turns to a murky brown and it is a real eyesore. All of the pollution isn'n our fault but some of it is. We carlessly pollute our oceans thinking that it is a never ending supply. That is not true. We need to save our ocean from the critical condition that it is in so it can be here for the generations to come.