Cause and Effect 2-1 World Population Growth | Baamboozle - Baamboozle

English 15 Public

Cause and Effect 2-1 World Population Growth

Study Slideshow

How has the population of the world changed in the past 200 years? (D)

The population of the world increased gradually in the last 200 years and it speeded up during the last century.

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What natural resources does the Earth have?

Raw materials found in the nature, such as crude oil, natural gas, stones, minerals, forest, land, animal, water resources.

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What are the renewable natural resources?

Renewable natural sources can be replenished at a higher rate than they are consumed. These are: solar, wind, hydro, tidal, geothermical, biomass energy.

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What are the nonrenewable natural resources?

Nonrenewable natural sources sources that will run out or will not be replenished in our lifetimes. These are: coal, natural gas, oil and nuclear energy.

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What is the propotion of fresh and salt water on the Earth?

More than 97% of the water on Earth is salt water. Only 3% of the water on Earth is fresh water.

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What is desalinization? Why isn't a solution?

It's the removal of salt from salt water. It's not a solution to the shortage of fresh water because it takes a lot of energy and it's very expensive.s

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Why cannot we use most of the Earth's water?

On the Earth more than 97 % of the water is salt water. Three quaters (2,25%) of the remaining 3% of fresh water is frozen at the North and South Poles.

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How much damage has overcultivation caused?

Overcultivation has already damaged an amount of farmland equal to the size of the United States and Canada combined.

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What threatens the clean air?

It is threatened by the growing population. The average person today puts about 1.1 metric tons of carbon into the atmosphere each year.

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Where do the air-pollutants come from?

Most of it comes from the burning fossil fuels - oil, gasoline, coal, wood and natural gas.

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What are commercial energy sources?

Commercial sources are coal, petroleum and electricity as they are bought and sold.

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Why is demand for energy increasing everywhere in the world?

As the population of the world increases and the standard of living goes up in other countries, so will the demand for energy.

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What is the population of Earth now? How many people can the Earth support?

Currently the population of Earth is about 7,88 billion people. The Earth may be able to support 9 billion people.

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Which are the world most populous countries? What tendency for population growth there?

FREE ANSWER

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What is the tendency of population growth in your country? (D)

Since the 1950s the Vietnamese population almost quadrupled. 70 years ago it was nearly 25 million and it will reach soon 100 million.

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