How do electric cars produce less pollution when you have to plug them into your house power which is mostly produced from pollution energy sources?

The price of home electricity is also shooting through the roof.
Read the book "The Solar Hydrogen Civilization" by Roy McAlister
246 pages addressing every issue people think is the reason why hydrogen isn't the answer, and he doesn't discount solar, wind, water and the rest but explains why it's best to use those methods to produce hydrogen. Seriously it trumps anything I've every read.