COP27’s agreement on observing the oceans sets a strong foundation for policymakers to invest in internationally linked observation that will help countries better monitor these carbon sinks.
From planting mangroves to dumping minerals in the ocean, there are lots of ideas for ocean carbon dioxide removal – and even more questions.
The cost of deploying a direct air capture unit must fall while the cost of emitting CO₂ rises.
One estimate suggests at least a sixth of all emissions cuts expected from the Inflation Reduction Act would come from carbon capture.
A climate scientist looks at what works and some popular ideas that aren’t as cheap or effective as people hope.
While carbon dioxide removal from the air is not a replacement for emissions reductions, it can supplement these efforts. Experts are continually researching the best ways to do this.
Plan to cut emissions quickly, use offsets sparingly and set broader goals for improving society.
Klaus Lackner is finding new ways to cut the technology’s high costs and energy demand, and he’s about to launch the first ‘mechanical tree’.
Removing carbon from the atmosphere raises political questions that should be addressed by democratic institutions.
The language around climate change can feel overwhelming. A psychology and public policy expert breaks it down in plain English.
The world is moving away fossil fuels, and there’s nothing Australia can do about it. Racing to dig up and sell whatever fossil fuels we can before the timer stops is not a future-proof strategy.
In ancient Earth’s atmosphere, microbes called acetogens were able to recycle carbon dioxide using chemical energy sources such as hydrogen.
New UK-wide trials aim to discover the best ways to suck carbon from the air.
Prominent academics, including a former IPCC chair, round on governments worldwide for using the concept of net zero emissions to ‘greenwash’ their lack of commitment to solving global warming.
CO₂ will need to be removed from the atmosphere to avoid catastrophic heating. Can the process be incentivised?
Manufacturing minerals is an expanding field of study. Making more of them could help alleviate various pressures faced by our growing population. But how are they made, and where can they be used?
Carbon Engineering’s clever harnessing of high-school chemistry is just a small step on the path to negative emissions.
Adding industrial chemicals and natural alkaline minerals could slow climate change, but like other geoengineering proposals, it comes with many complex technical and legal challenges.
For the second year in a row global greenhouse emissions from fossil fuels have risen, putting 2018 on course to set a new record, according to an annual audit from the Global Carbon Project.
Technology exists to capture carbon dioxide from the atmosphere but it has a big cost.