Besides all the jobs and other economic factors that would disadvantage the US on a global scale if they agreed to the accord, we just have to look to Germany - a country that is following the standards put in place by the accord - to see what the consequences would be. They pay more than 3x per kWh for electricity than the US. This might be something that the middle class and up could afford, but this would unfairly target the poor and in poorer countries would cause death and suffering. This alone is reason enough to look for better solutions.