Global warming, also referred to as climate change which means a current increase in temperature of the earth’s surface as well as it’s atmosphere due to rising levels of greenhouse gases. It is a big issue of the atmosphere on the earth. It is caused by the human as well as by natural events. Human is the causes for emission of greenhouse gases such as methane, nitrous oxide, and carbon dioxide. Over the past 100 years, the earth has warmed by about 1°F.
Aforementioned phenomenon increases Earth temperature about 16 to 36 Celsius. With the higher amount of greenhouse gases increases a thermal energy. The biggest prejudicial greenhouse gas is CO2. From the year 1860, the percent of carbon dioxide increased about 30 percent. The higher rise (90%) of CO2 came from industry developed countries as Europe, North America and Asia.
Scientists also predicted that the average temperature could increase between 1.4 to 5.8°C by the year 2100. Greenhouse gases can cause global warming. Based on Collins Dictionary, The greenhouse effect is the problem caused by increased quantities of gases such as carbon dioxide in the air. These gases trap the heat from the sun, and cause a gradual rise in the temperature of the Earth's atmosphere. Gases such as carbon dioxide, sulphur dioxide, methane, nitrous oxide, halocarbons and so on, built up in the atmosphere due to increased use of energy and the expansion of global economy in the 20th century.
The first thing and also the most significant thing is that the planet is warming. Over the last century, the planets temperature has risen by around 0.6 of a degree celsius. Carbon pollution has driven up the global average temperature for more than a century. So perhaps it’s no surprise that the 10 hottest years ever recorded have all occurred since 1998. The hottest year on record is 2016.
To begin with, the advancements in agriculture, manufacturing, and transportation have caused a rapid increase in fossil fuel burning such as coal, oil, and natural gas, as well as other practices that release pollutants in the atmosphere since the Industrial Revolution in 1850 . These forcings have affected the temperature of the earth because concentrations of carbon dioxide, methane, and nitrous oxide have increased in the atmosphere , and carbon dioxide which is known to be a greenhouse gas  is a main component to the warming of the earth . These greenhouse gases trap some of the heat on earth by absorbing solar radiation and re-emitting heat in all directions  which essentially leads to the increase of temperature in the earth. It is also measured that greenhouse gases with a higher Global Warming Potential (GWP) absorb more energy per pound, which warms the earth even further . Moreover, the
Carbon dioxide emanations is the most vital reason for the whole earth’s temperature boost. CO2 is made by flaming sources, such as oil, regular gas, diesel, natural diesel, petrol, natural petrol, and ethanol. Most people do not know that when carbon dioxide is discharged to the environment, it stays for 100 to 200 years. As a result, this leads to an expanding concentration of carbon dioxide in the air, which thus causes the normal temperature of the earth to raise. Martin Rees (2016) , a professor of cosmology and astrophysics , writes in his article ”Human Induced Threat” that the atmosphere of CO2 focus is increasing for the most part because of the heated of fossil powers.These auto fumes vent these gasses into the air, and they turn out to be a piece of the air, leading to global
Once carbon dioxide in the atmosphere increases 1 time, the average global temperatures will rise 1.5 ~ 4.5 ℃, and the temperature increases in the polar regions are about 3 times higher than the average. There are many factors cause the global warming and the global warming has brought a lot of serious consequences. Therefore people began to attach importance to this phenomenon. Numerous countries and organizations banded together to discuss the countermeasures. From 1981 to 1990, the global average temperature increased 0.48 ℃ than it was 100 years ago.
Friendliness of solar energy to the global environment can be explained in term of global greenhouse effect, and byproducts released. Solar energy along with other renewable energy plays a big role in minimizing greenhouse effect. Most of the traditional energy generating system affects local climate and interferes with Earth’s overall heat balance due to the net addition of heat into the atmosphere during electric generation process (Aubrecht, 2006). Combustion of traditional sources of energy like fossil fuel increases the amount of carbon dioxide (CO2) in the atmosphere which induces a heightened greenhouse effect and warming of the earth (“Renewable Energy”, 2015). In the other hand, Aubrecht (2006) stated that all solar energy devices redistribute thermal energy from one place to another and do not release additional thermal energy to the atmosphere.
Scientists discovered that carbon dioxide is an important effective gas for the greenhouse effect. Moreover, gases like carbon dioxide, methane and water vapour can affect the energy balance of the Earth. This happens because they are able to absorb the longwave radiations emitted from the Earth’s surface. The result of this process is the increasing of the amount of the heat energy in the Earth’s climatic system. With no greenhouse effect, the average of the global temperature of the Earth would change from 15 to -18 Celsius.
There are a number of factors that allow scientists to believe that human activity is the source of climate change. Carbon emissions are the main cause of global warming. When human beings burn carbon based fuel like coal and gasoline for energy, the carbon dioxide they release is lighter than the carbon dioxide from other sources. The level of lighter carbon dioxide has increased drastically in the last 40 years. Another cause of global warming is deforestation.