Can someone explain exactly how electric cars fight climate change when 75% of electricity is generated from fossil fuels?

Did I mention that the batteries and other components of electric cars contaminate land and water with extremely toxic chemicals that will poison every living thing on the planet (not only when the materials are being mined and transported but also when they are disposed of at the end of their lifecycle)?

Did I mention that Communist China controls the world's supply of essential minerals and materials needed to make electric cars and will therefore control transportation (and can shut it down at will) making the world dependent on them and making trillions of dollars in profits off of electric cars that they will use to do their evil bidding?

Did I mention that China is using child slave labor (as well as adult slave labor) that works in strip mines in other countries such as in Africa that destroy the land to get these essential minerals required to build electric cars?

Can someone explain exactly how electric cars fight climate change when 75% of electricity is generated from fossil fuels?
Updates
6 mo
Did I mention that with all electric cars all it would take is a single EMP detonated over the USA for Communist China to shut down our entire transportation system?
Can someone explain exactly how electric cars fight climate change when 75% of electricity is generated from fossil fuels?
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