Machines using giant fans and filters can literally suck carbon dioxide out of the air. Sounds great – but the technology faces many challenges.
Zero emission? Carbon neutral? Carbon negative? What does it mean to achieve 'net-zero' emissions?
The plan has plenty on reducing emissions, but less on removing already-emitted carbon from the atmosphere.
Because pledges alone won't achieve net zero.
To avoid global warming on a catastrophic scale, nations need to reduce emissions and find ways to pull carbon from the air. One promising solution: spreading rock dust on farm fields.
'Natural climate solutions' are vital. But huge plantations of the same tree should not count.
The Drax biomass plant in Yorkshire is the first in the world to pioneer carbon capture and some specialists see it as it has a bright future. But hold the rosy headlines.
Earth is fast approaching the red lines that scientists have urged temperatures cannot cross if we have any hope of avoiding catastrophic climate change. Here are the emergency measures we need.
The latest UN climate report makes it clear that the task of limiting climate change is urgent and huge. We must start to transform our economy today, but it will bring rewards as well as challenges.
The UN's panel on climate change said that technologies to remove CO2 will be necessary to limit global temperature rise to only 1.5 degrees Celsius. But these techniques are largely unproven.
A disaster fantasy raises questions about tinkering with Earth's climate. With real-life scientists exploring geoengineering, what conversations should we be having now around these technologies?
Scientists want to exploit a natural process of carbon storage.
Phasing out greenhouse gas emissions entirely by mid-century is possible, and promising trends are emerging. But the next five to ten years will be the real test of whether we can make that happen.
Sometime soon we'll need to take more carbon out of the atmosphere than we emit – but how?