Answer:
Rubber tree, oak, spruce, pine are some examples of trees that are commonly cut down
Explanation:
The cutting down of trees is commonly known as deforestation. It has become a major issue as a huge number of trees have been cut down in the past years. The trees of tropical forests are mostly affected because of the abundance and variety of trees in this region. These trees include the softwoods and hardwoods. Examples of some softwood trees are spruce, rubber, pine, and fir, whereas, hardwoods include oak, maple, and hemlock. These trees are mostly used to make paper, wooden furniture, palm oil and also shampoos. In addition to this, the trees are also cut down for building houses, grazing of animals, agricultural purposes and used as fire to cook food in remote areas.
The cutting down of trees affects the trees and plant species, and also the fertility of the soil decreases. The organisms existing in this region are also affected due to their loss of habitat.
Answer: b. Asteroids can cause great damage if they collide with Earth.
Explanation:
The main idea is that asteroids can cause great damage to earth if they collide with our planet. This is what the entire article was centred around starting with an example of the effects of the last time there was a collision with Earth.
It then goes forward to talk about the chances of being hit by another asteroid and what scientists will do if the Earth is at risk of being hit by one which shows that the whole point of the article is the damage asteroids can cause on earth and why this should be avoided.
Answer:
Coal: 7.4 billion tonnes
Explanation:
The World Coal Association estimates that there are more than one trillion tonnes of coal reserves worldwide, enough to last 150 years at current rates of production, so it is unsurprising to see coal ranked as the most-mined mineral in the world.
While China has consistently led the world in production – the country was responsible for 3.3 billion tonnes in 2016 – this was down 16% from the 3.9 billion tonnes produced in 2012. Chinese coal output slumped below the 3.4 billion tonne-threshold predicted in 2016 and the trend may continue, as renewable energy sources become more widespread.
The Chinese decline has mirrored a trend in worldwide coal production, which fell to 7.4 billion tonnes in 2016 from 8.2 billion in 2012. While coal production has increased in Australia and Russia in the last five years, both South Africa and the US have seen sharp declines in production of anthracite and bituminous coal. American coal production in particular has fallen from over 900 million tonnes in 2012 to 782 million in 2016, the lowest figure since 1979.
Hope that Helped!
