“Humans are almost entirely the cause” of climate change, according to a scientist who once doubted that global warming even existed. As many scientists and physicists across the world believe that human activities contribute to climate change by causing changes in Earth’s atmosphere in the amounts of greenhouse gases, aerosols (small particles), and cloudiness. A recent report of the Intergovernmental Panel on Climate Change states that the largest known contribution comes from the burning of fossil fuels, which releases carbon dioxide gas to the atmosphere.
Greenhouse gases and aerosols affect climate by altering incoming solar radiation and outgoing infrared (thermal) radiation that are part of Earth’s energy balance. Furthermore, changing the atmospheric abundance or properties of these gases and particles can lead to a warming or cooling of the climate system. Since the start of the industrial era (about 1750), the overall effect of human activities on climate has been a warming influence.
The human impact on climate during this era greatly exceeds that due to known changes in natural processes, such as solar changes and volcanic eruption. As a result it is clear why climate change has such a big impact on our planet and what it has in store for our future as well. It is caused by many reasons as stated above, with supporting evidence it no doubt that climate change is becoming serious as time passes.
Most climate scientists agree the main cause of the current global warming trend is human expansion of the greenhouse effect. Certain gases in the atmosphere block heat from escaping. Long-lived gases, remaining semi-permanently in the atmosphere, which do not respond physically or chemically to changes in temperature, are described as “forcing” climate change whereas gases, such as water, which respond physically or chemically to changes in temperature are seen as “feedbacks. Many of these gases are water vapor, carbon dioxide, methane, nitrous oxide, and chlorofluorocarbons. The role of humans play a very important role in climate change, in its recently released a recent report called, the Intergovernmental Panel on Climate Change, which states, a group of 1,300 independent scientific experts from countries all over the world under the auspices of the United Nations, concluded there’s a more than 90 percent probability that human activities over the past 250 years have warmed our planet.
Furthermore, it concludes that the industrial activities that our modern civilization depends upon have raised atmospheric carbon dioxide levels from 280 parts per million to 379 parts per million in the last 150 years. The panel also concluded there’s a better than 90 percent probability that human-produced greenhouse gases such as carbon dioxide, methane and nitrous oxide have caused much of the observed increase in Earth’s temperatures over the past 50 years. They said the rate of increase in global warming due to these gases is very likely to be unprecedented within the past 10,000 years or more.
Scientists have blamed human activities such as causing a negative effect on the planets natural resources such as increasing amount of greenhouse gases releasing into the atmosphere, burning more unnatural sources, and cutting down more forests. As a result, restricting the use of unnecessary resources and contributing to a cleaner process. Many reports state that when humans burn gasoline, coal, natural gas, and other common fuels to make electricity or drive cars, they release a substantial amount of carbon dioxide into the atmosphere.
For every gallon (or liter) of gasoline your car burns, 1300 times that volume of CO2 is released (a gallon of gas weighs about 6 pounds or 2. 8 kilograms, but the released CO2 would weigh over 19 pounds or 8. 75 kilograms).
To prove the case that climate change is mostly caused by humans, scientists had to take into account other factors: complicated atmospheric physics, the interactions between air and land and between air and water, changing amounts of ice and of desert and forest, and the natural processes that have changed the climate for 4. 54 billion years. To do all this, scientists recreate the crime scene. Because there’s only one Earth, they do that with computers. Climate scientists use powerful computers to construct models based on physics of the climate system.
These models enable scientists to make predictions and test hypotheses about what processes affect the climate. These models are based on the fundamental of science, many of them include thermodynamic principles, orbital dynamics, and the balance of heat entering and leaving the atmosphere. Scientists can do experiments with these models that they can’t do on the planet. They can set the atmosphere to match conditions a century ago, and see whether the model’s predictions match what scientists measured at the time.
And they can set the models to match conditions millions of years ago, to better understand how past climate changed. This allows them to verify that the models are accurate and to fine-tune the output. They can also remove the effects of human activities from the models, and see how much of the climate change they observe is still predicted by the models. As a result, there is very little time on what necessary steps must be taken in order to decrease the climate change and stabilize the amount of greenhouse gases omitted into the atmosphere.
Certain gases in the atmosphere block heat from escaping therefore are resulting in an increase on the rate of global warming throughout the planet Climate scientists use powerful computers to construct models based on physics of the climate system. These models enable scientists to make predictions and test hypotheses about what processes affect the climate. Many hard proved evidence point to only one reason, which is towards human activities, resulting in a negative effect throughout the Earth’s atmosphere causing many disasters, climate change, raise in sea levels, and most importantly a threat to the human race, and other life forms.