1. Biochar

Biochar, created by pyrolysis of biomass. Pyrolysis is a process where biomass is partially combusted in an oxygen-limited environment, which produces a char rich in carbon.

This char can be distributed in soil and this Biochar can store large amounts of greenhouse gases in the ground for centuries

At the same time its presence in the earth can improve water quality, increase soil fertility and raise agricultural productivity

Finalists competing with biochar designs are Biochar Solutions, US, Black Carbon, Denmark, Full Circle Biochar, US