You do not help the economy by imposing a tax or restriction on industry. Ecotaxes may indeed create jobs, but so would paying a guy to randomly smash windows. Furthermore, the article you cited credits job creation predominantly to "income redistribution" from ecotaxes; So, it really has little to do with "eco" and more to do with "taxes". Ecotaxes and alike will hurt the economy, period. But, is it a necessary cost in order to preserve our environment?