Answer: Water pollution can have disastrous effects on the environment.
Explanation:
- Pollution in the water can reach a point where there isn't enough oxygen in the water for the fish to breathe. The fish can suffocate and not have enough air.
- Pollution affects the entire food chain. Small fishes absorb pollutants, such as chemicals, into their bodies. Bigger fishes eat the smaller fishes and get the pollutants as well. Birds or other animals may eat the bigger fishes and be harmed by the pollutants. One example of this was the use of the insecticide (bug killer) DDT, which is when birds of prey ate fishes that were infected with it, they would lay eggs with thin shells. The population of birds of prey began to drop until DDT was banished.
- Sewage causes major problems in rivers. Bacteria in the water will use oxygen to break down the sewage. If there is too much sewage, the bacteria could use up oxygen until there won't be enough left for the fish.
- Water pollution from major events like acid rain or oil spills can completely destroy marine habitats.
- One of the most important commodities for life on planet Earth is clean water. For over 1 billion people on the planet, clean water is nearly impossible to get. Dirty, polluted water can make them sick enough to die.
Answer:
Most erosion – the breakdown and movement of soil and rock – in the world is caused by wind, water and gravity. The effect of soil erosion on agricultural land is bidirectional: Humans can be a cause by exposing soil to natural forces, but wind and water can independently cause erosion.
Explanation:
Answer:
D. They force Africa to lower the prices on its goods.
Explanation:
Trade barriers refers to the restrictions on the international trade and commerce that is induced by the government of a country. Trade barriers have a bad effect on the economy of a country. It is detrimental as considered by economist.
Countries like that of Africa who imposed a trade barrier on the international trade suffers a lot on economic efficiency of the country. These countries depends on the exports for funding their economy. Trade barriers in Africa forced the businesses to sell their goods at a lower price that affects the economy greatly.
Answer:
According to the most widely accepted theory of the formation of the Moon,The Moon formed when a Mars-sized object collided with the Earth about 4.5 billion years ago('Giant Impact Theory').Consistent with the collision theory,the composition of the Moon is very similar to the Earth's mantle.
Explanation:
Answer:
B. Most nations had one primary religion.
Explanation:
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