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Is it right to try and engineer changes in the earth’s climate? Could we try and devise ways to prevent volcanic eruptions or earthquakes? Geoengineering can take many forms, from ‘artificial trees’ to mirrors in space. How realistic are these ideas?

Here are the questions you have sent in that we have answered. If you have a question you would a geologist to answer, email Click on the questions below to read the explanation given by one of our geologists.