Burning coal causes a large amount of air pollution.
When coal is burned, it releases many air pollutants. This includes mercury, lead, sulfur dioxide, nitrogen oxides, and other unsafe gasses and heavy metals. This is extremely harmful for humans and the Earth.
The sun rises in the east and the picture is in the west and the sun is there so the answer is evening
Answer:
Salmon populations in the United States is declining due to the following factors:
1. Over-fishing and human activities have put a major influence on the population of salmon.
2. Due to industrialization, urban growth, unplanned farming, deforestation, and pollution would have imparted strains on the stocks of salmon. Apart from this chemical contamination from the industrial run-off and agricultural activities are also declining populations of salmon.
3. Genetically modified fish from hatcheries usually escape and interbreed with wild fish, thus, changing the genetic features of the populations.
4. Construction of hydropower dams is also a major cause of the salmon population declining.
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Consider two bodies A & B which collide with each other. If 
be the force exerted by the body A on Body B. Then Body B will also exert force 
on Body A which is equal in magnitude but opposite in direction.
The force exerted by Body A on Body B is called Action, and the force exerted by the Body B on Body A is called Reaction.
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<em><u>Trees </u></em><em><u>provide </u></em><em><u>socio-economic benefits</u></em><em><u> by creating a friendly environment that lures more customers to the shopping areas they are found.</u></em>
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Trees are very important to our environment for the following reasons:
- They release oxygen during photosynthesis, thereby producing oxygen for humans
- Trees take in carbon dioxide during photosynthesis, thereby purifying the atmosphere and limiting greenhouse effect.
- They also beautify the environment
- Trees serve as shades for humans
All these importance of trees is what will definitely lure people to go to shopping areas that have trees planted in them.
This means that, trees boost sales of businesses wherever they are planted. In this way, we can state that because trees create a friendly environment, people are lured where trees are and they spend more money there, and so therefore, it serves as social or economic benefit.
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