People have a desire to make their lives really convenient and easy. And in order to achieve this, people have changed and altered the Earth. A lot of people believe these activities have improved the Earth, however, I strongly believe that people haven't improved the Earth but have damaged the Earth. Because these activities ruined the environment,(,없이) and threaten people's lives.
First of all, human activities have damaged the environment greatly. In order to fulfill meet their needs, people have built developed a lot of industries and created pollution-causing things. And these inventions have ruined the Earth and brought life-threatening changes. For example, people have made a lot of inventions which are very essential for our lives in nowadays., such as automobiles,(,없음) and refrigerators. And But they produce greenhouse gas, which is very detrimental for the environment and , causing the global warming. And as result of the global warming, a huge amount of glacier in the South Pole is melting,(컴마 반드시) which decreases the population of penguins and polar bears. Not only that, a lot of countries are suffered from catastrophic floods (which are) caused by the global warming. * greatly 보다는 considerably 가 좋겠네요.
Second, human activities threaten people's lives. In order to protect themselves people`s lives and become strong, people have invented very dangerous inventions. And these inventions are causing so much troubles and threatening people's lives. An example for this statement is the invention of weapons. There are so many crimes which are related to with gun shots. And millions of people die every year from war weapons, such as bombs, bullets, and chemical weapons which are all invented by human. And in order to become a strong country, many countries are trying to invent nuclear weapons, which could ruin the entire world. Consequently, this is a clear indication for why human activities have damaged the Earth.
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To sum up, I wholeheartedly believe that human activities have not enhance the Earth. The reasons are that not only that do human activities cause damage to the environment, but also these activities threaten people's lives. Therefore, these are two most plausible reasons for my opinion.
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