Used Hybrid Vehicles Is It True A 'Hybrid' Vehicles Battery Production Causes More Pollution Than Conventional Vehicles?

Is it true a 'Hybrid' vehicles battery production causes more pollution than conventional vehicles? - used hybrid vehicles

There is a rumor that I heard that the battery of a hybrid type in Canada begins (mining and processing), are transported to Europe, Asia and then to develop vehicles for sale: And the cost of production more damage to the environment than gasoline vehicles. (The rumor still more to say than a Humvee!). Any site with a REAL (no arguments) to prove one way or another?
If that's true, you can click on the search for alternatives.