Answer:
animal wastes and fertilizers
Explanation:
The majority of the nitrates that are polluting the rivers come from the animal wastes and from the fertilizers used in the agriculture. The increased amounts of nitrates in the rivers causes eutrophication. This basically means that the water is becoming over-saturated with nutrients. This leads to the spreading out of the algae. As the algae spread out more and more, they cover the surface part of the water, so large portions of the rivers do not receive sunlight, which kills of the organisms that use photosynthesis. Further, the algae reduce the amount of oxygen in the water, often resulting in dying out of the fishes. It is a chain reaction that leads from one thing to another and the end result is devastating.
Answer:
The crust is the coldest layer of Earth. It floats on the fluid-like matter called the Mantle.
Explanation:
Answer:
Disadvantages of Exports
Fluctuation in foreign exchange rate. ...
Economic conditions in importing country. ...
Political conditions in importing country. ...
Change in regulation in importing country. ...
Rivalry between nations. ...
Socio barriers. ...
Higher working capital requirement. ...
Credit risk.
Farm land are being lost because companies are using them to build houses over them