If we get less CO2 but more mercury in our environment, is that a good tradeoff?

TG Daily - Switching from higher to lower energy light bulbs may increase Mercury emissions

New Haven (CT) - Yale University researchers have discovered that in many places around the globe, switching from high energy incadescent light bulbs to energy saving varieties (such as Compact Fluorescent Lighting, or CFL) actually increases the amount of Mercury released into the atmosphere. The report has to do with a number of factors, including the type of power generation used by the region. It's turning out that the fight against global warming is not the same for everybody.