5. Grassland restoration

♤ It refers to Changed management methods for grasslands can significantly increase the uptake of carbon dioxide into the soil, creating a carbon sink.

♤ This and other land use change methods is not generally considered among negative emission technologies because it is uncertain and very long-time taking strategy.

♤ Finalist competing with grassland restoration design: The Savory Institute, US

♤ Criticisms: Co2 removal is slow to act, and requires a long-term political and engineering program to effect.