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He also founded a not-for-profit contemporary art space in Miami called El Espacio 23.

Like many care firms, the not-for-profit company Darren works for says it is "on a bit of a knife-edge" as the government is also increasing the costs of employing people.

In 2021, Sheen declared himself a "not-for-profit" actor, pledging to use all the money he earns for good causes.

Current satellites are typically designed to monitor one scale of emitter, says Riley Duren, the CEO of the Carbon Mapper, a not-for-profit organisation that tracks emissions.

He enlisted 60 friends to give £50 each to establish a not-for-profit business.