UNDO is a for-profit climate technology company, founded by Jim Mann, that delivers permanent carbon dioxide removal through enhanced rock weathering (ERW). It crushes silicate rock such as basalt and wollastonite and spreads it on agricultural land in the UK, US, Australia and Canada, with field trials in East Africa. UNDO sells carbon removal credits to businesses, offers monthly subscriptions to individuals, and partners with farmers. It runs its own science programme (labs, monitoring sites, geochemical modelling, MRV) and a custom data and tech stack for traceable, verifiable removals.