How we ended up paying farmers to flood our homes | Food Production and Preservation | Forums

I'm confused. It's probably because I'm not very smart, but here goes. In the beginning, he said the cause of the flooding was the removal of of trees, etc. for farmland, which then allows the water to run off into the Thames and causes flooding downstream. Then later in the film, he switches gears and says it's because of Climate Change (btw, why isn't it called Global Warming anymore?) Did I miss something??