Clarkson rejects the scientific consensus on climate change, believing that anthropogenic greenhouse gas emissions do not affect the global climate. He has also expressed doubt that the effects of climate change are "a bad thing", saying in 2005 "let's just stop and think for a moment what the consequences might be. Switzerland loses its skiing resorts? The beach in Miami is washed away? North Carolina gets knocked over by a hurricane? Anything bothering you yet?" However, during a 2019 trip to Cambodia while filming "The Grand Tour", Clarkson acknowledged the "graphic demonstration" of climate change impacts on the Mekong River and Tonlé Sap was "genuinely alarming", but still expressed doubt that it was driven by human activity. Cambodia was undergoing a severe drought during the show's filming. Clarkson is dismissive of climate activism, and has often made personal attacks against activists, such as teenage activist Greta Thunberg, whom he has called "a spoilt brat".