Reframe Cash for Clunkers to Focus on Harm Reduction
Governments provide many incentives to buy electric cars or install solar panels. Generally speaking, these subsidies are availed by rich people since the new "stuff" costs a lot of money. Instead, why not give the same subsidy to people to buy a more sustainable car — not necessarily the most sustainable car. This is similar to Cash for Clunkers but with an eye turned towards reducing the carbon footprint.