One of the biggest impacts humans have on aquatic systems is excess nutrient inputs. Nutrients, like nitrogen and phosphorus, are essential to the health and survival of aquatic plants and animals. However, humans introduce large quantities of nutrients, primarily through overuse of fertilizers. Too many nutrients can rapidly reduce water quality by causing overgrowth of certain bacteria and algae that use the oxygen necessary for other species to survive. Even more problematic is that these nutrients can be transported downstream to other streams, rivers and bays. Therefore, nutrients can reduce water quality in places far removed from where they were first introduced.
Today, environment polltuion is hot issue. Do you know the cause of pollution originates from the tasks seeming samll our daily life. Firstly, factories dump industrial waste into oceans, rivers, lakes,...lead to water polluted effects warm water decreasing oxygen. Secondly, indutrical waste exhaust from car and plane...lead to air polluted effects causing disease death to humans. Finally, trash from household is another cause sush as : preticdes..., lead to soil polluted effects Earth's surface. In short, we are more aware of protecting the environment.
