The Causes of Global Warming


Jimmy Jin




The Causes of Global Warming

Global warming is now a serious problem. It has a bad effect on Earth. Global warming means an increase in global temperatures. Global temperatures have been rising since the 1980s and are not on a downward trend. In the last century, human’s massive use of fossil fuels is the main cause of global warming, they will emit a large number of greenhouse gases, such as carbon dioxide. The atmosphere can make the sun’s shortwave radiation reach the ground, but after the surface is heated, a large number of long-wave thermal radiation outward is absorbed by the atmosphere, so that the surface and the large temperature in the lower layer act as a greenhouse for growing crops, which is often called the “greenhouse effect”, and leads to global warming. Some gases in the atmosphere do not allow heat to escape, like water vapor. Global warming will cause a number of serious problems, and the planet will redistribute rainfall around the world, possibly exacerbating droughts in arid regions. The earth’s glaciers and permafrost will begin to melt, especially in the Antarctic and Arctic. With the melting of a large number of glaciers and permafrost, the sea level will rise rapidly, which not only destroys the balance of the ecosystem but also threatens the food supply and living environment of human beings (A blanket around the Earth). Global warming is mainly caused by human activities, such as massive deforestation, air pollution, and some agricultural problems. The deforestation is one of several human beings’ activities causes of global warming. Trees are really useful to control global carbon emissions. Thirty-one percent of the earth’s land area is covered by trees. They produce the oxygen that humans need and provide good shelter for animals. Most of the animals in the world live in forests, especially those precious animals that are facing extinction. Forests provide many benefits to the world’s estimated 1.6 billion people, who depend on them for their livelihoods. Forests provide people not only with food and medicine but also with shelter. However, due to some human activities, the world’s forests are at risk of being cut down by humans. Human deforestation takes many forms, including land development, agricultural deforestation and pasture construction. In addition to man-made deforestation, there are also natural factors causing deforestation. Severe climate change will lead to forest degradation, such as the land which becomes desert. Forest loss like this not only seriously destroy human life, but also affect the plants and animals that live in the forest. Forests play an important role in global warming because trees can absorb carbon dioxide from the air and keep the earth’s temperature from rising. About 15 percent of carbon dioxide emissions are due to deforestation. If trees are burned or cut, they will become carbon. Carbon has more than 21 billion tons of reserves in tropical forests. The carbon emissions will be caused if the trees are cut down. These carton emissions will raise the temperature and cause global warming. It also makes global extremes more frequent. The people in Sumatra changed the rainforest into pulp plantation. This behavior directly leads to excessive local greenhouse gas emissions. The reason why this kind of behavior causes changes in water flow and precipitation is that the balance between the land water and the water in the air is destroyed when the trees are cut down. Trees can fix fertile soil. Without the help of trees, the soil can be eroded and pulled into the water. Some plants, such as coffee and soybeans, can rapidly increase soil erosion. Since 1960, a third of the world’s arable land has been destroyed by soil that can no longer be planted. It is also a vicious circle. The more good soil is lost, the more forest is cleared for new land. The more you do that, the faster you lose land (Deforestation). Deforestation is a very common problem in today’s society. Because the greenhouse effect is having an increasing impact on the earth, most people know that if deforestation continues, it will have a beneficial effect on the greenhouse effect. It may not feel bad at first, but over time the effects will intensify, and eventually humans will suffer the consequences. By then, it will be too late for humans to correct what they have done when they realize it was wrong. Carbon dioxide and sulfur dioxide are the common air pollution in Global warming. The suspended smog which above the cities is one of the easiest pollutions among air pollution. Carbon dioxide is one of the most common greenhouse gases and a major cause of global warming. Although humans and animals produce carbon dioxide when they breathe, carbon dioxide is considered a pollutant when it is associated with vehicle emissions and other human activities that contribute to greenhouse gas emissions. These human activities which cause the carbon dioxide have already released too much carbon dioxide. In the last 150 years, the amount of carbon dioxide in the atmosphere has been higher than at any time in hundreds of thousands of years, because these human activities that cause carbon dioxide emissions have released large amounts of carbon dioxide into the earth’s atmosphere. In addition to the main greenhouse gases carbon dioxide, there are methane and chlorofluorocarbons. The first comes mostly from animal emissions, and the second used to be the main refrigerant component. With the passage of time, the development of human science and technology as well as the importance of earth protection, human found that CFCS caused great damage to the earth’s ozone layer, so the ban of CFCs. Sulfur dioxide, another greenhouse gas linked to climate change, is part of the smog. Sulfur dioxide and a small number of other chemicals are major contributors to acid rain. Acid rain does a lot of damage to the soil, not only the soil, but also the buildings. When sulfur dioxide is released in the air, it will lower the temperature of the earth, because sulfur dioxide can block the sunlight. In the past, volcanic eruptions were the main cause of sulfur dioxide. Each eruption resulted in a large amount of sulfur dioxide entering the air and a long period of temperature decrease. Many industrialized countries have been focusing on reducing smog and sulfur dioxide emissions, which can effectively improve air quality and enable people to breathe fresh air. But with less sulfur dioxide in the air, global warming is likely to get worse, because it cools the air by blocking sunlight as it pollutes the air. With the increase in people’s awareness of environmental protection, more and more people choose zero carbon emission. They prefer to walk and cycle to school or company, and replace private cars with public transportation, such as buses and subways. This can effectively reduce carbon emissions (Air Pollution). Livestock and farming are among the most carbon-intensive sectors of agriculture. There is a strong link between agriculture and global warming. They interact with each other, Global warming has a big impact on food production. With the rapid growth of the global population, science predicts that the world population will increase by 2.2 billion people in the next 2050, from the current 7.5 billion to 9.7 billion. This is accompanied by higher demand for crops. In addition, crop yields could be cut in half in the next 35 years due to climate change caused by the greenhouse effect. But the more this happens, the more people will deforest and use the land that used to be the forest for crops. Between 2000 and 2010, humans accounted for 5 percent of global carbon dioxide emissions by clearing land for agriculture and livestock. The pursuit of animal husbandry in developing countries makes agriculture not only need a large amount of fertilizer, but also a large amount of land area. The only way to get a lot of land is to cut down forests. On the other hand, trees can absorb carbon dioxide, thus controlling the trend of global temperature rise. If trees are cut down in large Numbers, the earth will lose a large number of “air converters”, and suffer from various harsh climate caused by global warming more frequently, which will make agriculture enter a vicious cycle. For the most part, when agriculture does bad things in global warming, it does nothing for the earth’s growing population. China’s capital, Beijing, imports 80 million tons of soybeans in the Brazilian amazon for the purpose of feeding pigs, and what humans don’t know is that the soybeans used to feed pigs are destroying one of the planet’s green lungs (Perrone). Comment by Robbi Shedron: Comment by Robbi Shedron: Comment by Robbi Shedron:

Using organic agriculture will have a positive impact on global warming. Each acre of organic farming can eliminate 7,000 pounds of carbon dioxide emissions per year. Rodale’s research shows that under the right conditions, organic agriculture is no worse than primitive agriculture. In contrast, during periods of drought, organic farming yields increase because the carbon it previously stored in the soil helps it store more water. During periods of moisture, the organic matter in the soil as a barrier to protect the roots of organic plants from being eroded by too much water, resulting in lower productivity. These two characteristics of organic plants make them more adaptable to changes in temperature caused by the greenhouse effect. With the development of science and technology, the agricultural sector will achieve “carbon neutrality” by 2030, which can effectively eliminate the carbon emissions caused by agriculture to the earth in the future. This has played a great role in controlling the increasingly serious greenhouse effect, and human beings no longer need to cut down forests for agriculture (Dunn). Comment by Robbi Shedron:

But most developed countries do not use organic agriculture but industrial agriculture. Industrial agriculture is bad for earth, it has some negative impacts on global warming. The world’s industrialized agricultural land accounts for 12 percent of greenhouse gas emissions, and the U.S. food system accounts for about 20 percent of carbon dioxide emissions in the United States. The equipment and agricultural chemical will course greenhouse gas emissions. Industrial agriculture requires a lot of equipment and it also USES a lot of pesticides. These things emit greenhouse gases in use, such as carbon dioxide and sulfur dioxide. These would affect between 25 and 30 percent of U.S. carbon emissions. The industrial agriculture also has the same problem as organic agriculture. People will still choose to cut down trees in order to own more cultivated lands. Although humans have gained farmland, forests can make important gains in the way global warming is controlled, because trees can absorb carbon dioxide in large quantities. Human’s massive deforestation, not only will cause the aggravation of the greenhouse effect, but also make the crops yield low (Dunn). Comment by Robbi Shedron: Comment by Robbi Shedron:

Global warming is now a very serious problem in the world. It has a big and bad impact on Earth. It is precise because of some human activities that global warming has occurred and become more and more serious, such as deforestation, air pollution ,and some agricultural problems. The only way to lower the gradually rising global temperature is that human should control themselves in doing those things. If they do, the Earth will be better than before. Comment by Robbi Shedron:

Works Cited

“Air Pollution.” nationalgeographic, global-warming/pollution/. Accessed 16 Jan 2019. “Deforestation.” worldwildlife,

Accessed 16 Jan 2019.

Dunn, Collin. “6 ways agriculture impacts global warming.” truehugger, 19 Nov. 2009,

warming.html. Accessed 16 Jan 2019.

Dunn, Collin. “6 ways agriculture impacts global warming.” truehugger, 19 Nov. 2009, warming.html. Accessed 16 Jan 2019. Perrone, Tommaso. “How agriculture and climate change are related: causes and effects.” lifegate, 5 Feb, 2018, Agriculture-and-climate-change-causes-effects-impacts. Accessed 16 Jan 2019.

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