I believe that global warming has several demerits for human being. Global warming is one of the biggest issues in the world. It is caused by greenhouse gases, for example CO2. These gases warm up the earth like greenhouse. A lot of countries, organizations and citizens effort to prevent global warming. However, the average temperature of the earth goes on raise. We begin to feel the effects of global warming. It is not future issue but present issue. So, I’ll talk about four main demerits of global warming.
Firstly, the demerit is that the land becomes small. It is the most famous demerit in global warming. Heating the earth, the ices on the earth melt and become a part of sea. Sea level raises and land becomes small. Especially, melting Antarctic ice is the important factor of raising sea level. Antarctic ice puts on Antarctic continent. It has strong influence on sea revel. That land become small is that a lot of people lose their living place. Already in a part of tiny island countries people can’t live their country by their island sinking.
Next demerit is to increase a number of diseases. For global warming, temperature of cold areas raises. Hot areas, for example tropical rain forest, have a lot of diseases. There are the sources of infection like tiny insects and animals. Even these sources of infection couldn’t live in cold area, including Europe, America and Japan and so on. However, if temperature of cold areas rises for global warming, the sources of infection will be able to live in cold areas and these diseases will increase.
In addition, increasing abnormal weathers is the demerit we feel strongly several years. There are abnormal weathers all over the world because global warming begins to break eco system. In Japan, every summer is cold or very hot like man falls down, and winter is hot or very cold like heavy snows fall. Many tornados happen all over world and collapse houses. These abnormal weathers threaten our safety and prevent people to move.
The final demerit is to decline amount of producing foods. It is relevant to abnormal weathers. The crops being sensitive to heat can’t grow well for global warming. The representative crop being easily affected by hot weather is rice. In future, there is a possibility of not eating rice. Moreover, the crops being strong against hot weather may fail by abnormal weathers. People won’t be able to get a comfortable meat.
All in all, I talked about four main demerit of global warming, land becomes small, diseases increase, many abnormal weathers happen and producing foods decreases. These demerits are very terrible for human being. So, we should prevent to make progress global warming. Already we can see several demerits, but these demerits don’t become the worst conditions. We have a time to act protecting the earth. I think that we never ignore the demerits of global warming.