China’s ‘Great Green Wall’ boosts carbon sink, study finds

Phys.org  October 20, 2023 Three-North Afforestation Program (TNAP) in China is the largest ecological restoration project on Earth (ongoing from 1978 to 2050), harboring a huge area of newly planted forests, which provides a wealth of goods and ecosystem services that benefit society in East Asia. This project-induced carbon sink has been expected to be large, but its size and location remain uncertain. An international team of researchers (China, USA – Clemson University) investigated the changes in the C stocks of biomass, soil C and the C accumulation benefited from the ecological effects in the project areas from 1978 to […]

New additives could turn concrete into an effective carbon sink

MIT News  March 28, 2023 According to the researchers at MIT one potential option to move towards the 2050 carbon neutrality goal is the direct gaseous sequestration and storage of anthropogenic CO2 in concrete through forced carbonate mineralization in both the cementing minerals and their aggregates. They investigated the underlying mechanisms and chemomechanics of cement carbonation over time scales ranging from the first few hours to several days using bicarbonate-substituted alite as a model system. They showed that the carbonation of transient disordered calcium hydroxide particles at the hydration site led to the formation of a series of calcium carbonate […]