The environmental lobby is the biggest proponent of cap and trade or a carbon tax. I think that government is jumping on the bandwagon and trying to acquiesce these eco-guilt superstars. In Ontario we just passed legislation (Green Energy Act) that ignored a pragmatic suggestions from people that worked on the grid (Power Workers) and exclusively paid heed to Environmental groups and the wind industry, both of which don't understand the need for a well balanced energy mix. Now are taxes, and energy prices are going to skyrocket. Its a tax grab but its being influenced by people who know nothing about tax policy, energy markets and the electricity mix.