Answers to the 15 questions (No.17) Posted by Junya

I’m going to answer the question “What is the cause of global warming?”. Then I selected two sources, one was the website of “GLOBAL WARMING EFFECTS AND CAUSES: A TOP 10 LIST” and the other was the news website of “Causes of Global Warming”. From the first source, I learned that there are many causes of global warming. The most significant cause of global warming is carbon dioxide emitted from fossil fuel burning power plants and burning gasoline for transportation. Our increasing use of electricity from power plants and increasing use of car from burning gasoline for driving emits fair amount of carbon dioxide into the atmosphere. Except for carbon dioxide, methane emissions from animals and agriculture, deforestation and increase in usage of chemical fertilizers on croplands are very serious cause of global warming.
From the second source, I got to know that humans are responsible for the cause of global warming because humans emit several greenhouse gases in a variety of ways. Humans burn fossil fuels in cars to drive a car, factories to product something and electricity production to live a comfortable life. This act leads to the emissions of carbon dioxide. 
In conclusion, toward the question “What is the cause of global warming?”, we can say that there are a lot of causes which are responsible for global warming. The most significant cause is carbon dioxide, so we should try to decrease the amount of CO2 in the atmosphere. 

Reference 1: Global Warming Effects and Causes: A Top 10 List. (2018, January 25). Retrieved from 
https://planetsave.com/2009/06/07/global-warming-effects-and-causes-a-top-10-list/

Reference 2: Causes of Global Warming. (2017, July 14). 
Retrieved from 
https://www.nationalgeographic.com/environment/global-warming/global-warming-causes/

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