Global warming from volcanoes has led to mass extinctions in the past. We could be following the same steps, taking us on a path from global warming to global mass extinction.
Arctic warming is thawing the permafrost and releasing methane into the atmosphere. Scientists warn of similarities to the world's greatest extinction, the Permian extinction.
Heatwaves too hot to survive are forecast for later this century. Deadly mega-heatwaves lasting months are predicted every other year for regions around the world. Billions will be affected.
The Earth's climate is predicted to return to a state not seen for millions of years, well before modern humans even existed. The change may occur surprisingly soon.
Climate change is thinning clouds. Latest models predict the disappearance of the most common cloud - stratocumulus - leading to an 8 °C (14.4 °F) rise in global temperatures.
Companies are already removing CO2 from the atmosphere and burying it. Better tech is in the pipeline. How to make money from it though, is still up in the air.
The rock lockdown for CO2. Ground up basalt and olivine may absorb gigatonnes of CO2. Scientists are investigating on a beach in the Bahamas.
Soil stores a massive amount of carbon, about 3000 gigatonnes worth, and there's room for even more.
Dr Stuart Licht's new company C2CNT has found a way to convert CO2 in the air into highly priced graphene and carbon nanotubes. Nanotechnology is the next big thing, but will it be enough to use up all the excess CO2 in the atmosphere?
Microscopic organisms known as phytoplankton floating in the ocean could be behind the world's ice ages. Can they be fertilised with iron to cool down the planet again?
