There is so much pollution that goes into making those vehicles, and all the waste from the batteries that need to be recycled every 8~10 years. This makes no sense from an environment perspective. You're better off buying older vans, that aren't so old they aren't inefficient, and just keep running those. Plus you're talking about more growth and selling more products, which is just more waste. We can't buy ourselve…
More: http://www.cmu.edu/me/ddl/publications/2010-JMD-Shiau-etal-P...
And in general: https://www.cmu.edu/cit/veg/