As well as rapidly reducing the carbon dioxide that we humans are pumping into the atmosphere in huge amounts, recent scientific assessments of climate change have all suggested that cutting emissions alone will not be enough to keep global temperatures from rising more than 1.5 or 2 degrees C.

The Intergovernmental Panel on Climate Change and others have all stated that extracting CO2 from the air will be needed if we are to bend the rising temperature curve before the end of this century.

These ideas are controversial with some seeing them as a distraction from the pressing business of limiting emissions of CO2.

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But a new assessment from the US National Academies of Sciences, Engineering and Medicine says that some of these "negative emissions technologies" are ready to be deployed, on a large scale, right now.

1- Coastal blue carbon
This report says that there is a lot of potential for increasing the amount of carbon that is stored in living plants and sediments found in the marshy lands near the sea shore and on the edges of river estuaries. They include mangroves, tidal areas and seagrass beds.

Together, these wetlands contain the highest carbon stocks per unit area of any ecosystem.
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