Climate change is one of the biggest issues of our time, and I'm excited by new solutions to our greenhouse gas problem.
Geologists have shown that carbon dioxide trapped in water-containing rocks deep underground can stay buried for more than a million years. It's a boost for energy projects that try to pump carbon dioxide from fossil fuel power plants into these rock formations. But I'm sceptical about this approach. Isn't it better to leave fossil fuels in the ground in the first place?