MicroChar is a project by James Greyson to enable small scale carbon-negative sustainable biochar to happen everywhere fast enough to reverse climate change.


Biochar is charcoal, made from left-over or waste dried biomass, and returned to the soil rather than burnt. Biochar takes carbon from the air via plants and stores it in the ground. This reverses the process of carbon from the ground being stored in the air. Biochar makes it possible to reverse climate change if done sustainably at global scale.

Small scale biochar

Biochar can be scaled up in two ways. Large equipment can take biomass from a large area and create large amounts of biochar to be sold widely. However larger biochar operations are less sustainable and more likely to be used to extract biomass and profit from an area. Micro-scale biochar, in homes and communities, can be scaled up by happening intensively everywhere.


The MicroChar project shows how to reverse climate change by making micro-scale biochar happen everywhere quickly. Innovative cookstove designs are created and shared. Powerful policy is designed to combine biochar with a revival of economies, ecosystems, climate stability and food security. Workshops are provided for groups interested in the practice of fast systemic change.

Climate Rescue Centre

MicroChar seeks a part-wooded site in East Sussex to establish a world-leading Climate Rescue Centre. The Centre will develop and teach small scale biochar, as well as leading advanced research on the available policy options for attempting to quickly reverse climate change.  Suggestions and help very welcome!

James Greyson

James is an expert on policy solutions for interlocked global crises (that are unsolvable separately). He is head of BlindSpot Think Tank and a Fellow of the Earth Systems Governance Project. He works on collective intelligence with MIT’s Climate CoLab and researches global security in the NATO Science Programme. James finds that biochar is an effective way to make systems thinking and systemic change tangible. It’s also doing wonders for his veg garden!

James with a simple ‘less than zero emissions’ stove