It is a scientifically proven fact that, our planet has slowly been warming up. Since the beginnig of the 20th century, the avarage tempature around the world has gradually risen by one degree of fharenheit. Nevertheless, this minimal warming might not seem significant, the truth is the impact will be devastating if this warming up process will continue to increase at current rate. Scientist have been working on the ‘key factors’ of this progressive heating up process, and found three major points.
One of the fundamental reason for global warming is pollution. Burning of fossil fuels, and oil, our current energy sources, leads to the emission of totally harmful gas to our world that is carbon dioxide. This emission process is resulted in the greenhouse effect which is one of the most detrimental consequence of global warming, and it traps certain gasses such as carbon dioxide, nitrous, and methane. Therefore, the greenhouse effect also heats the world.
Another major factor is the population growth. Actually, we are the most dangerous creatures to our living place. More human means more food, and more methods of transportation. That means more methane, since there will be more agriculture and burning of fossil fuels. Manure is a powerful source of methane which is one of the greenhouse gasses. Furthermore, the population growth is increased the need for transportation. Unfortunately, we prefer private transportation rather than public transportation which increases the emission of harmful gasses.
Finally, deforestration is another underlying point, and the annihilation of forests might be the saddest event that the world has been experienced. Deforestration is responsible for nearly 1/4 of all carbon emissions entering the atmosphere. The process of deforestation is “doubly” dangerous for the planet, because not only are we adding millions of tons of carbon dioxide into the atmosphere each year, but we are also wiping out the most effective cleansers of that deadly CO2 gas, the trees and the plants. Instead of replacing the trees, we use forest as a property for our homes and buildings, so we are constantly taking advantage of our natural resources and giving nothing back in return.
Consequently, global warming is an alarming issue, unless measures are taken the result will be inevitable and soon. We are the ones who responsible from our planet, so each person should be attentive.
TOEFL listening lectures: A university lecture on the history of the English language