How to Cool the Earth Read Answers

How to cool the earth? Answers to the reading are as follows:

1. Read the full text. What methods have scientists proposed to cool the earth in recent years?

Answer: Sprinkle sulfur into the atmosphere; install lenses in Earth orbit; use space shields to block sunlight; bury carbon dioxide under the sea.

2. Read and point out that Dutch scientist Paul Crutzen proposed the principle of releasing sulfur particles into the upper atmosphere to artificially cool the earth.

Answer: The diffusion of sulfur in the atmosphere will increase the reflectivity of the earth to sunlight. The role played by sulfur is similar to setting up countless small mirrors in the air, preventing some sunlight from reaching the ground, thereby producing an overall cooling effect on the earth (you can quote the original text or summarize it in your own words).

3. Each small mirror is about 0.6 meters wide, very thin, and weighs as much as a butterfly. In one sentence, the weight of a butterfly is mentioned. What is its function?

Answer: Comparison shows that each small mirror is very light in weight (just state its function clearly).

4. After reading the text, you also want to do something to cool down the earth. Please draft a slogan to call on people to take action.

Answer: Protecting the global environment starts with saving resources. Start from yourself, save every drop of water, every kilowatt-hour of electricity, drive less cars, use more energy-saving products, use air conditioners sparingly, etc. (just think about it).

Cool the Earth

Global warming is an indisputable fact today, and hot weather will continue to occur around the world year after year. Faced with the increasingly severe crisis that global warming has brought to human life, work and production, in addition to urging the international community to take practical measures to reduce greenhouse gas emissions, many scientists have proposed various methods to cool the earth in recent years. .

Some of the ideas are almost fanciful, but they also provide new perspectives for mankind to solve the problem of global warming.

Spread sulfur into the atmosphere. Dutch scientist Paul Crutzen, winner of the 1995 Nobel Prize in Chemistry, proposed a plan last year: releasing sulfur particles into the upper atmosphere to artificially cool the earth. He believes that sulfur particles can be sent high into the atmosphere by releasing weather balloons or launching heavy artillery shells. The diffusion of sulfur in the atmosphere will increase the earth's reflectivity of sunlight.

The effect of sulfur is similar to placing countless small mirrors in the air, preventing some sunlight from reaching the ground, thus producing an overall cooling effect on the earth.

According to estimates, if this plan is implemented, the annual expenditure required will be approximately US$50 billion, and each person in developed countries will have to bear US$25-50. Because Crutzen has a high authority in atmospheric research, this idea has attracted the attention of scientists from various countries.

Install lenses in Earth orbit. Scientists have noticed that the Earth reflects approximately 30% of the sun's rays back into space, while absorbing the rest. If the reflectivity of the earth can be appropriately increased, it can easily offset the warming of the earth caused by greenhouse gases, and the earth can cool down as a result.

Roger Angel, a famous astronomer at Arizona State University, proposed that a giant parasol composed of small mirrors could be installed in Earth orbit to reflect the sun's rays back into space. He calculated that this parasol may require tens of thousands of small mirrors. Each small mirror is about 0.6 meters wide, very thin, and weighs as much as a butterfly.

Use the space shield to block the sun. Some scientists from the University of Cambridge in the UK have proposed a bold and astonishing idea to spend billions of pounds to place a giant space shield above the earth, so as to effectively block sunlight radiation and cool down the earth.

Bury carbon dioxide into the ocean floor. The various ideas mentioned above are all aimed at blocking or reflecting sunlight. Another British scientist has proposed another idea: burying carbon dioxide, the culprit of the greenhouse effect, under the seabed, which can reduce the extent of global warming. The United States and the European Union have allocated huge sums of money to research ways to bury carbon dioxide in the oceans and earth.

Theoretically, oceans and ground could store the carbon dioxide produced by humans over thousands of years.

What the researchers want to verify is whether carbon dioxide dissolved in seawater will interfere with the survival of seabed organisms, because when carbon dioxide is dissolved in seawater, it will acidify the seawater.