Nature has been storing CO2 underground for millions of years. It’s often found with oil and gas. And for decades, Shell and other companies have injected CO2 into reservoirs to boost oil recovery. Some man-made CO2 is captured and used - for example, to put the fizz into soft drinks or to help tomatoes grow.
There are three ways to separate CO2 from the other gases.
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.