Richard Tice's position is still a long way from the scientific consensus that humans have dramatically disrupted the climate, but marks a shift in comparison with earlier in the year, when he told Sky News man-made climate changed was "garbage".
Michael Burry, who was played by Christian Bale in the 2015 film The Big Short, has bet against Nvidia and other technology stocks, causing market plunges worth hundreds of billions of dollars.
The private astronaut, who has twice been to space in commercially funded missions with SpaceX, was nominated by the US president in the spring, but the rug was pulled at the last minute over his previous donations to Democrats.
Fresh polling by YouGov, carried out exclusively for Sky News, finds that belief in and concern about man-made global warming remains as high as in their heyday in 2021, when the UK hosted the COP26 climate summit.
A nation going alone and attempting to dim sunlight in one region could cause extreme droughts and other weather disturbances elsewhere in the world, the report warns.