Is there a pollution called plant pollution?
I've never heard of such a term but for sure genetically modified plants can cause soil pollution. Forest fires (natural, controlled or intentional) are source for air pollution. So there is a plant pollution after all, or at least pollution caused by plants
Depends on where you get the electricity to recharge the batteries. If the electricity is produced in a hydro-electric plant then there is almost no pollution. If the electricity comes from a nuclear power plant then you have nuclear waste. If the electricity comes from a coal-fired plant that you do have pollution from the burning of coal.