The environmentalists have outlawed HFCs....HFCs are 1% of our emissions , one unit of HFT emission is equal to up to 14,000 units of CO2 emission per Environment Canada. The average  HFT unit is 1,000 times as damaging as one unit of CO2 equivalent. CO2 equals 78% of our GHG emissions. So, one unit of HFT times 1,000 versus 78 units times 1. Elimination of HFTs eliminates 95% of the GHG problem re global warming. That is the point that Kerry was making. To drive my point even further, the model that predicted doom and gloom assumed global HFT emissions increasing from 1% to 19% by 2050. Shake up all your brain cells and join the dots. Neither US EPA or Environment Canada are disputing the above.