1. INTRODUCTION
Carbon dioxide is a naturally occurring greenhouse gas. This gas plays a major role in the growth of global warming. Because of increase in urbanization and industrialization, the emission of carbon dioxide increased which lead to the rise in the global warming.
In Martial environment, carbon dioxide is in the largest proportion around 95.9% which make it unable for the life. These days many researchers are working on the environment of mars. But because of the excess of carbon dioxide present in the environment it make difficult to stay for a long time. Carbon dioxide can be decomposed for the production of various useful compounds such as methane, oxygen and other different compounds.
There are several methods from which carbon dioxide can be converted into useful compounds. Carbon dioxide can be reduces to oxygen and other carbon compounds. The available for the reduction of carbon dioxide are direct thermal decomposition, photo-reduction, electrochemical reduction and photo-electrochemical reduction.
In direct thermal decomposition, it requires ultra high temperature around 3200-4600 K but yield is only 30%. The electrochemical reduction of carbon dioxide is the conversion of carbon dioxide to more reduced chemical species electrical energy but in this reaction along with the reduction of carbon dioxide, oxidation of water also takes place photo-electrochemical reduction, a chemical process in which carbon dioxide is reduced to carbon monoxide or
Greenhouse gases are those that absorb and emit infrared radiation in the atmosphere. The most abundant greenhouse gases in Earth 's atmosphere are: Carbon dioxide, Methane, Nitrous oxide ,Ozone ,Chlorofluorocarbons (CFCs). Human activities also contribute to climate change by the amounts of greenhouse gases, aerosols (small particles). The largest known contribution comes from the burning of fossil fuels, which releases carbon dioxide gas in the atmosphere.
Global warming is a rise in the Earth’s global temperature, whether through natural or man-made circumstances. Factors causing global warming through natural means would be volcanic emissions and increased solar activity. The major issue with global warming is the progress of humankind. Increases in industrialization and deforestation, which release the greenhouse gas, carbon dioxide (CO2), act as a blanket in the atmosphere. CO2 with the combination of water vapor, trap heat from the sun between the atmosphere and the earth’s surface, causing a rise in temperature (Haldar, 2011).
I. Introduction Long ago, since ancient time humans have been using energy and striving for the betterment of themselves, it all began with the use of tools which led to the discovery of fire, from this great breakthrough, humans evolved exponentially. Eons have passed and humans are still using fire to ease their daily lives from cooking, mobility and electricity, but due to the increase in advancement of technologies, it has also increased damages to the planet, thus the governments had started to move towards a producing or replacing the old harmful substance to a less harmful ones, but since one of the most used and one of the highest cause of ozone depletion is chlorofluorocarbon (CFC), it has been banned from production due to the Montreal Protocol 1991, one of the causes as to why it was banned is one of the chemicals it contain is chlorine, once a certain condition is met it depletes the ozone layer, ergo with earth shield compromised more harmful ultraviolet rays will get into the planet, thus only the reservoir of CFC are being used today, now it’s a race against time to replace this CFC with other materials that is less harmful and either as or more efficient than it. There are not a lot of ways to replace chlorofluorocarbon. Some of the most prominent ones are hydrochlorofluorocarbon (HCFC), hydrofluorocarbon (HFC) and magneto caloric effect (MCE).
The molecular formula for carbon dioxide is CO2. It has a carbon atom and bonded with two oxygen atoms. Carbon dioxide is only water soluble when the pressure is maintained.
When all these extra gases are released, carbon dioxide stars to accumulate in the atmosphere. Climate change is a global issue because when the temperature of the Earth changes even very slightly, it can cause droughts and our crops can die. This is affecting our food supply. Also, when water levels rise even slightly, it can be very destructive for
By releasing this gas into the air the natural greenhouse gases increase and cause many effects to happen. Carbon dioxide is also caused by removing natural resources from the land for agriculture. When the Earth starts to warm many other things do to, the ocean will become more acidic and glaciers might partially melt. If the oceans become acidic, fish and other sea creatures will have an unlivable environment. If glaciers start to melt arctic animals that rely on the ice may start to become extinct.
So What Causes It? Global warming occurs when greenhouse gases, such as carbon dioxide, nitrous oxide, and methane trap heat inside the earth 's atmosphere. Think about what happens when you open your car door after the windows have been rolled up on a hot day.
1. Introduction: Carbon dioxide (CO2) is one of the important green house gases (GHGs) emitted in the atmosphere through various human and natural activities. The human activities include rapid industrialization and urbanization, deforestation, excessive use of fertilizers in agriculture, excessive use of fuels, papers and many other manmade resources whereas natural activities include volcano eruption, forest fires, earthquakes etc. Emission of GHGs in the atmosphere leads to global warming which is one of the primary reasons behind the atmospheric changes that affect the human life directly or indirectly. The consequences of global warming are extremely harsh seasons, untimely rains, extended summers and floods that results in human deaths, destruction of flora and fauna in addition to the huge economical losses.
These gases retain heat on earth thus increasing the temperature above average. Different gases have dissimilar abilities to trap heat. Deforestation is also another important reason for global warming. Plants release oxygen and take in carbon, thus providing us a clean and healthy environment. But by deforesting the lands, the trees would emit the carbon stored in them from hundreds of years making the air impure.
All of the greenhouse gases contribute to the atmosphere trapping heat and warming the earth and warming the Earth has many effects. The earth being warmed, meaning from North Pole to South Pole, melts ice in the poles. The melting of the ice causes sea levels to rise and the effect of that is flooding and lost habitat for animals. Increase in temperature makes some of population of plant and animal species go down. Increase in temperature also affects the weather.
Global warming also referred to as climate change is the gradual increase in the overall temperature of the earth 's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants in the air today. There are two causes of global warming, human influences and also natural causes. Global warming is increasing day by day because of all the natural causes going on. A greenhouse is a glass building that contains plants in it that needed to be protected from cold weather. These greenhouses attract heat from many things like the
Arguably the most significant thing humans have done to cause climate change is the drastic increase in CO2. As a result of human activities, carbon dioxide, methane, nitrous oxide, and the halocarbons (a group of gases containing fluorine, chlorine, and bromine) build up in the atmosphere over time, as well as the natural sources of CO2, like vegetation. The concentration ofCO2 has went from 280 to more than 380 parts per million in just two hundred years. Still currently rising, the burning of fossil fuels by humans will continue to cause global warming and climate
CHAPTER 1 1. INTRODUCTION The air we respire contains mixture of natural and man-made chemical, physical and biological elements that modifies ambient air quality. Among all air pollutants, the most threatening for human health include particulate matter and gaseous pollutants such as carbon monoxide, ozone, nitrogen dioxide and sulfur dioxide (WHO). The movement of people into urban areas and the growth of industry within these areas has carried more people into contact with air pollution than any other time in recent memory.
Global warming is the change in the average temperature of the earth is surface as a result of humans’ activity that pollutes the nature. The level of carbon dioxide has been increased in the upper part of the atmosphere which it leads to increase the average temperature on the surface which it causes many problems in many side of life including nature, health and economy. Increasing the concentration of carbon dioxide is due to release of poison gases to the atmosphere by cars, manufactures, oil field, burning of natural gases and smoking. Air pollution and climate change are a result of increasing the level of carbon dioxide around the world.
Environmental issues began to be discussed and debated only towards the end of the 20th century. Since then significant amount of literature has been penned down raising awareness about issues of pollution, deforestation, animal rights and several others however it has failed to result in major changes, ideas or even actions to save the environment. Several species of animals have become extinct; pollution level is at an all-time high, global warming is leading to severe climate changes all across the globe but these problems do not seem to alarm the decision makers. Leydier & Martin (2013) also states that, “despite the increasing expression of concern in political and media debates about issues such as climate change, pollution and threats