Human Activities and Climate Change Thesis 2022

Climate Change 1
HUMAN ACTIVITIES AND CLIMATE CHANGE
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Climate Change 2
INTRODUCTION
Climate change refers to long-term substantial changes in wind patterns, precipitations, global
temperature and other measures that occur after many years. This thesis seeks to asses if human
activities responsible for the change in the climate. It is completely true beyond any reasonable
doubt that human activities are the major cause of climate change. Some of the human activities
that result in climate change include increased emissions of greenhouse gases by the use of fossil
fuel, cutting down of trees responsible for absorption atmospheric CO2, and increased waste.
Emission of Greenhouse Gases
Greenhouse gases such as ozone, nitrous oxide, methane, carbon dioxide are responsible for the
emission and absorption of radiation heat hence trapping the heat in the atmosphere increasing
the internal temperature of the earth commonly known as global warming. The increased internal
earth temperature results in climate change currently witnessed across the world namely, a rise in
sea levels, increased temperatures, cryosphere, heatwaves, and tropical cyclones (Seung-Jae, et
al., 2017). Human activities are responsible for the emission of greenhouse gases in the
atmosphere for the last 15 decades. The largest source of greenhouse gas emissions is the
burning of fossil fuel for transportation, heat, and electricity. The major human activities causing
greenhouse gas emission globally include agriculture at 12.5%, commercial and residential at
10.3%, Industries at 16.8%, electricity production at 21.3%, transportation at 14.0%.

Climate Change 3
Figure 1: Human activities causing Greenhouse gas emission (Zevenhoven, 2015)
Transportation is the largest contributor to greenhouse gases and emissions come from fossil fuel
burning from planes, trains, ships, trucks, and cars (Anomohanran, 2012). 90% of the fuel
used in the transport sector is based on petroleum which includes diesel and gasoline. From the
various sources of greenhouse gas emission listed above, it is clear that the major cause of
climate change which is greenhouse gas effects and global warming are both caused by the
emission of greenhouse gases from various activities done by a human (Schwartz, 2018).
Therefore, it is true beyond any reasonable doubt that human activities are responsible for
climate change.
Deforestation
Plants generally make their food through the process of photosynthesis and the major resources
required during the process are carbon dioxide gas that naturally exists in the atmosphere of
emitted through the burning of fossil fuels. Therefore the availability of trees increases the
potential of trees using available CO2 to generate food. However, this is not the case globally, the
number of trees is being reduced daily in every corner of the world hence the available streets
cannot effectively absorb CO2 in the environment resulting into an increased CO2 in the