It’s rather obvious that human causes are more vulnerable compared to natural causes. Natural causes are normally external to the climate system, such as changes in volcanic activity, solar output, and the Earth 's orbit around the Sun. On the other side, climate change that are caused by human activities, are such as the burning of fossil fuels and also the conversion of land for forestry and agriculture. Not only that, carbon dioxide is also one of the main cause of human-induced climate change. Ever since the Industrial Revolution, the production of carbon dioxide which is a greenhouse gas has been increasing tremendously.
Fossil fuels are the largest gas emitters in the world that helps to power electricity. Fossil fuels contribute to 75% of carbon and other gas emissions such as methane in the atmosphere. Although they are essential in daily life, fossil fuels have a huge impact on the environment contributing to global warming, acid deposition and pollution. Burning fossil fuels at high temperature produces electricity but also leads to pollutants in the air and water. According to ZeeNews, Over the past 250 years burning fossil fuels have raised the atmospheric CO2 concentration by more than 40% over its preindustrial level of 280 parts per million.
Throughout the course of history the earth’s climate has dramatically, changed within the last 650,000 years, there has been seven cycles of glacial advance and retreat. “In the past two decades, the scientific community has reached an overwhelming consensus those human activities are causing changes to the global climate.” (David B. Resnik). There has been a massive increase production of carbon dioxide, methane, and other greenhouse gases in the last century that has caused the climate change around the world. “If humanity does not start significantly reducing greenhouse gas emissions, average global temperatures will likely increase by several degrees Celsius in the next fifty years, which would lead disastrous environmental consequences, such as flooding of coastal areas, increased numbers of powerful hurricanes, desertification, decreased agricultural productivity, and loss of biodiversity.” (David B. Resnik). The main driver of today’s warming is the combustion of fossil fuels.
These include volcanic forcing, solar forcing, solar variability and the industrial chemicals. The cause of our current climate change issue is from human beings. Anthropogenic variables is the leading role of climate change today.Climate change currently is caused by the increase of greenhouse gases in earths atmosphere. The increase of greenhouse gases is driven by man made forces. In the industrial revolution the amount of greenhouse gases like Carbon dioxide increased.
Most climate scientists are agreed on the key parameter of climate change is the increasing amount of greenhouse gas concentration in the air. Solomon et al claimed that even if carbon dioxide emission is stopped now, the effects on climate could be reversed in 1000 years’ time (Solomon et al, 2009). According to NASA statistics, “the atmospheric concentrations of carbon dioxide, methane, and nitrous oxide have increased to levels for many years and concentration of carbon dioxide has increased from 315.71 ppm in 1956 to 398.78 ppm in 2014. Ocean acidification is caused by the absorption of 30% of the emitted anthropogenic carbon dioxide in the oceans (NASA Earth Science Communication Team, 2015). All those evidences have proved that the human factor is one of the major factors in rapid rise of greenhouse gas emissions.
In addition, Nasa held a scientific consensus and in this article many Organisation said their opinion on climate change, American Geophysical Union (AGU) said, “Human‐induced climate change requires urgent action. Humanity is the major influence on the global climate change observed over the past 50 years..” , this is just more evidence that many other scientific corporations also think that climate change is caused by humans. Everything on this planet has a cycle like how the planet cools and heats itself up by rotating in the sun’s orbit and the cycle of photosynthesis which converts carbon dioxide into oxygen, many people might think it 's just another phase of a cycle but the human specie has
Climate change is also caused by land use for two reasons. From 1750 to 2007, about two-thirds of anthropogenic CO2 emissions are produced from burning fossil fuels, and one-third of emissions from changing the lands use, primarily deforestation. Deforestation both reduces the amount of carbon dioxide absorbed by deforested regions and releases greenhouse gases at the same time, mixed with aerosols, through biomass burning and along with CO2, methane and nitrous oxide are also greater forcing contributors to the greenhouse effect. Add the largest contributors of power stations by burning coal, gasoline, and natural gas is diluting the naturally-occurring carbon dioxide in the atmosphere. Data from Trudinger, et al.
Earth's average temperature has risen by 1.4 degrees Fahrenheit (0.8 degrees Celsius) over the past century, according to the Environmental Protection Agency (EPA). Global warming begins with the greenhouse effect, which is caused by the interaction between Earth's atmosphere and incoming radiation from the sun. Besides that human activities give a contribution for causing global warming
In the “Deforestation” article under the heading Increased Greenhouse Gas Emissions, it states, “Tropical forests hold more than 210 megatons of carbon, and deforestation represents around 15% of greenhouse gas emissions.” A side effect of this is that greenhouse gases are being emitted into the atmosphere. The gas, when being released into the atmosphere, contributes to the rising temperature, the changes in the weather and water, and an increase in extreme weather events. When the greenhouse gases are emitted into the air the weather pattern can change an affect the forest dwelling creatures, their habitat and decrease the ability to get food and water. Some believe that this can be one of the major causes that it contributing to global warming today. Deforestation is an important issue that needs to be addressed and discussed soon.
These gases are believed to be the main cause of climate change. The three most well known greenhouse gases are CO2, CH4 and N2O. The concentrations of these gases in the atmosphere have increased drastically since the pre-industrial times. It is well documented that the increase in concentrations of these gases is caused by anthropogenic activities that includes the use of fossil fuels as well as agriculture. Apart from the atmosphere, the hydrosphere is also affected by this abnormal change in the concentrations of the mentioned gases.
The carbon dioxide levels have risen over the last 10,000 years. CO2 is thought to be the greenhouse gas that causes climate change and global warming. It possibly went up due to the increase in the population. Since we breathe in oxygen and exhale CO2. Everything is putting CO2 back into the environment but, at high rates.
Natural sources include decomposition, ocean release and respiration. Human sources come from activities like cement production, deforestation as well as the burning of fossil fuels like coal, oil and natural gas. In 2013, CO2 accounted for about 82% of all U.S. greenhouse gas emissions from human activities. Unfortunately human activities are having a substantial impact on altering the carbon cycle, both by adding more CO2 to the atmosphere and by affecting the ability of natural sinks, such as forests, to remove CO2 from the atmosphere. While CO2 emissions come from a variety of natural sources, human-related emissions are responsible for the increase that has occurred in the atmosphere since the industrial revolution.
Global Warming is the most controversial issue that we face today, because throughout the years we have been releasing greenhouse gases that are harmful in the long run and will affect the future generations. The temperature throughout the twentieth century has been increasing steadily by 1.4 degrees Fahrenheit a year. The cause of global warming is from the release of gases called GreenHouse gasses such as carbon dioxide, methane and several more. Factories ,cars, and other working companies release these gases while extracting fossil fuel from the earth 's crust. Alternatives sources of energy can be implemented because if we keep on using energy that releases these GHG then we might tear up the ozone layer.