Geoengineering (also known as climate intervention) involves large-scale human intervention in the Earth’s climate. Its aim is to counteract climate change, one of the biggest challenges facing humankind (see CHEMISTRY REVIEW, Vol. 25, No. 2, pp. 26–27).
Unlike other responses, such as changing human behaviour to limit greenhouse gas emissions, large-scale human intervention in the Earth’s climate is a radical idea. Just like other radical ideas, it is as intuitively exciting to some as it is frightening to others. It can therefore be thought of as controversial. However, it is important to remember that although climate change poses a major threat to many forms of life on Earth, this does not necessarily mean that anything that could be done to address it should be done.
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