A research made by the Royal Society warned that unproven techniques such as CO2 removal and giant space mirrors are risky.
The study examined two types of geo-engineering technologies. One is to reflect the sun rays away from Earth with the help of giant space mirrors to manage solar radiations and the second is to remove carbon dioxide from the air.
Speaking on the issue, John Shepherd, a professor at Southampton University, said, "We are not advocating geo-engineering. It is not an alternative to emissions reductions."