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In my perspective, human activity is the primary cause of climate change. Human activity including industrial activity, transportation and daily power expenditure is increasing gradually, so it will consume a great amount of fossil fuel to generate electrical energy to fulfill the demand of human activity. Therefore, the emission of greenhouse gas including CO2 will be increased particularly. According to statistics from the United States Environmental Protection Agency, the percentage of the global greenhouse gas emission has increased up to 43% from 1990 to 2015. It leads to the rise of the temperature of the Earth as Greenhouse gas will absorb the heat energy from the sun. Although human activity is not the only course of climate change, it leads to the temperature of the Earth increasing significantly in a few decades.

Therefore, human is the biggest cause of climate changes.

 

Trees assist in regulating the temperature by absorbing the atmosphere’s CO2. According to various estimates, a mature tree may take up to 46 pounds of CO2 annually. ​ In that same amount of time, roughly two acres of forest can offset the CO2 produced by the average car’s annual mileage. However, the carbon that trees have absorbed is released back into the atmosphere when they are chopped down. Since 1990, the global forest has shrunk by approximately 200 million acres because of human activity. As a result, the amount of greenhouse gases on Earth is rising.

 

In the video, it is stated that carbon dioxide due to the use of fossil fuels accounts for 57% of greenhouse gas emissions and that human activity is responsible for a net increase of 4 gigatons of greenhouse gases each year. CO2 levels are higher than they have been in the past 400,000 years, and it is noted that the increased CO2 comes from the burning of fossil fuels, not natural sources. Furthermore, the fast warming observed during the Industrial Revolution cannot be explained by climate models that take just natural factors into account. Warming is observed across the globe, not just in certain regions, which means it is not localized natural variations.

 

Although natural cycles, variations in the climate, and natural factors like volcanic eruptions and solar activity can also contribute to climate change, the current rate and extent of warming are far beyond what can be explained by natural variability alone. The quantity of solar energy that the planet receives fluctuates in cycles, but there hasn't been a discernible shift since the 1950s. NASA and other experts claim that solar activity could not have contributed to more than 10% of the observed global warming throughout the 20th century, therefore the natural factor is not the main reason to blame for the significant rise in global temperatures.

Human are generated a large amount of carbon emission such as burning fossil fuels, deforestation and industrialisation etc. With other kinds of pollution, it would make difference chemical reaction that trapping the heat. Although the earth also have responsibility to the environment, the effect from the human is larger and keep increasing year by year. The more people is polluting, the effect of climate change is more larger. Thus, we should be more concerned to the issue and try to reduce the carbon footprint. From the Paris agreement, is shows that the situation of green house gas issue is reduced and become better to the environment. 

In conclusion, it is no doubt that the primary cause of global climate changes is made by human activity and we should take more serious to the issue so that the environment could be better in the future.

I believe human didn't caused climate change, yet human activities are the oil that boost up the speed of climate change.

According to the research, the temperature waved all the time, even before human activities, such as factories and transportations produced green house gases. Therefore, the appearance of climate change may not links to the active development of human society. However, the over active production and development made a huge value of greenhouse gases produced, and caused the speed up of climate change. No doubt, over pollution will increased the seriousness of climate change, all the research showed this result. 

Therefore, I believe the human may not caused climate change, though the over producing of greenhouse gases may boost up the seriousness of it.

Other human activities that contribute to climate change include deforestation, agriculture, and transportation. Deforestation, for example, removes trees that absorb carbon dioxide from the atmosphere, while agriculture and transportation produce emissions of greenhouse gases.

The scientific consensus on human-caused climate change is supported by extensive research and analysis, including observations of temperature and climate patterns, computer models, and studies of the Earth's past climate history. While natural factors like volcanic activity and solar radiation can also affect the Earth's climate, they do not account for the significant warming that has been observed in recent decades, which is directly linked to human activities.