1.Can you give me some reasons as to why some people may think climate change is caused by natural forces not human activities? 2. Should we all play parts in limiting the climate crisis or there's nothing we can do?
1.Can you give me some reasons as to why some people may think climate change is caused by natural forces not human activities?
2. Should we all play parts in limiting the climate crisis or there's nothing we can do?
Climate change is caused by natural forces, not human activities
Natural forces are currently having the effect of cooling the earth at a rate of about 1/10 degree C per 1,000 years. Human activity is having the effect of warming the Earth at a rate of about 1.15 C per 100 years and accelerating. Natural forces are therefore running counter to the current warming trend, but being vastly overwhelmed by human activities and therefore rendered insignificant.
The Earth's climate can be affected by natural factors that are external to the climate system, such as changes in volcanic activity, solar output, and the Earth's orbit around the Sun. Of these, the two factors relevant on timescales of contemporary climate change are changes in volcanic activity and changes in solar radiation. In terms of the Earth's energy balance, these factors primarily influence the amount of incoming energy. Volcanic eruptions are episodic and have relatively short-term effects on climate. Changes in solar irradiance have contributed to climate trends over the past century but since the Industrial Revolution, the effect of additions of greenhouse gases to the atmosphere has been over 50 times that of changes in the Sun's output.
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