John Broome and Duncan Foley have argued that it is a ‘misperception’ that the ‘control of global warming is costly’ and that we can make ‘sacrifices unnecessary’. There are a number of assumptions that are essential for this idea to work. These assumptions can be challenged. Furthermore, my claim is not merely that the Broome/Foley argument is flawed, and therefore unlikely to be successful. I will argue that it is potentially harmful, leading to harms for the present generation and for (...) future generations. (shrink)