Human impacts on oceans
By Mashidat & Andy
Oil spills and how they can be harmful
Oil destroys the insulating ability of fur-bearing mammals, such as sea otters, and the water repellency of a bird's feathers, thus exposing these creatures to the harsh elements. Without the ability to repel water and insulate from the cold water, birds and mammals will die from hypothermia.
Impacts on overfishing effecting marine life
According to marine ecologists, unsustainable fishing is the greatest threat to ocean ecosystems. The practice destroys the physical environments of marine life, and distorts the entire food chain in the oceans. If the food chain breaks, the consequences will ripple up and down to all the living organisms that are in the chain.
Effects of Chemicals on Marine Life
The impact of industry has now reached every square mile of Earth’s oceans, and implications are ominous for ocean creatures and humans alike. In a study released in the February 2008 journal Science, researchers found that human activity -- from over-fishing to greenhouse gases and global warming to the introduction of toxins into the environment – has affected every square mile of ocean on the planet and strongly impacted roughly 40 percent of marine ecosystems.
Source pollution benifits
Pollution can be caused both by natural sources and humans. Volcanic eruptions are an example of natural sources of pollution. When a volcano explodes, it releases sulfur dioxide, carbon monoxide, solid particles, and other materials into the air at a much greater rate than is normally the case. Plants, animals, and humans may be killed or injured by these materials.