The former Beatles star and his Fab Four bandmate's wife have written an open letter to the British government demanding an immediate end to shale gas drilling projects in the U.K.
Other stars who have also signed the note include model/actress Lily Cole, funnyman Russell Brand, and screen stars Helena Bonham Carter and Jude Law.
The letter, published by British newspaper The Times, reads, "The government's plans to introduce fracking will change the Uk for ever... The government says that fracking is safe even though it is banned in several European countries and Us states... This technology will not bring down fuel bills and it will not provide a jobs boom, but it has the potential to leave a damaging environmental legacy for future generations.
"We urge the government to suspend fracking immediately while a genuinely independent, balanced and thorough public debate is held into the potential dangers this industry holds for the Uk."