The mitigation challenge to keep below 2°C warming is immense, yet policy makers show no sign of incentivising business to research, develop and deploy the required technologies.

Photo opportunities with wind turbines and solar panels abound, but the science shows that the Paris Agreement requires removing carbon dioxide from the atmosphere at scale. Yet, carbon dioxide removal is something governments don’t seem to want to talk about.

In a commentary published in Nature Climate Change, Oliver Geden and I suggest a three-point plan for governments to make progress on carbon dioxide removal.

In the 2015 Paris Agreement, governments not only agreed to limit the temperature increase to "well below 2°C", but they also agreed to reach net zero emissions in the second half of the century.

The scientific consensus is that achieving zero emissions sets our sights too low, we need to produce negative emissions by removing carbon dioxide from the atmosphere.

While wind turbines and solar panels are the poster child of a low carbon economy, they can’t stop emissions in agriculture, industry, and some parts of transportation. We have also left deep mitigation so late, that we may need to overshoot the 2°C target and use carbon dioxide removal to bring the temperature increase back down to 2°C above pre-industrial levels.

Since mitigation in some sectors may be too costly, and we have emitted so much already, it may be cheaper to remove carbon dioxide from the atmosphere. Modelling suggests that it may be cost effective to deploy carbon dioxide removal technologies from 2020 so that they can remove as much as 25-50% of our current emissions by 2100.