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Articles on Carbon dioxide removal

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Anya Waite (second from left) highlights the critical role of the ocean in regulating our climate, and the need to invest in observing oceans that store more than 90 per cent of all carbon, at COP27’s Earth Information Day event. (The Global Ocean Observing System)

Behind the scenes: How COP27 reached a deal that supports better monitoring of oceans to curb climate crisis

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.
This direct air capture plant in Iceland was designed to capture 4,000 metric tons of carbon dioxide per year. Climeworks 2021 via AP Photos

How not to solve the climate change problem

A climate scientist looks at what works and some popular ideas that aren’t as cheap or effective as people hope.
One ‘mechanical tree’ is about 1,000 times faster at removing carbon dioxide from air than a natural tree. The first is to start operating in Arizona in 2022. Illustration via Arizona State University

These machines scrub greenhouse gases from the air – an inventor of direct air capture technology shows how it works

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’.
Pictured is a slag pile at Broken Hill in New South Wales. Slag is a man-made waste product created during smelting. Anita Parbhakar-Fox

Our ability to manufacture minerals could transform the gem market, medical industries and even help suck carbon from the air

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?
Trapping carbon dioxide in minerals happens naturally over thousands of years. Can humans speed it up – safely? Simon Clancy

Can we tweak marine chemistry to help stave off climate change?

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.
AAP Image/Mick Tsikas

Carbon emissions will reach 37 billion tonnes in 2018, a record high

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.

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