How does human economic activity affect the nature of the oceans?

Human economic activities have a very negative impact on the nature of the oceans. It is very easy to prove it here. So, for example, tons of garbage are thrown into the ocean, which pollute the ocean, they float on the surface and create huge patches of garbage through which light does not penetrate and this harms the inhabitants of the ocean. In addition, tons of industrial waste are dumped into the ocean, which pollutes it. Also consider the various oil tanker accidents where hundreds of thousands of tons of oil are poured into the ocean.