https://www.kcl.ac.uk/news/public-hu...climate-change
There are two things here. Scientific evidence and people's perception/opinion.
In the first instance experts who have conducted peer reviewed studies almost universally agree the case for man-made climate change. As the study above shows however only 70% of the UK's population accept that.
It is not clear on what basis the almost two in 10 who think it's false base their perception on. Perhaps they think they have a greater gift than others and it fills them with a sense of self-worth, or perhaps loads of You Tube videos and tweets bombard them with supportive contrary views when they power up their phones in the morning which they accept and regurgitate without a moments hesitation.