If billionaires were less greedy and paid more, more people could choose environmentally friendly options. If billionaires were less greedy and sold environmental options for cheaper, more people could choose environmentally friendly options. If billionaires cared about the planet, they could use their influence to pass laws for the good of the planet.
Instead you have corporations holding salaries down and squeezing margins from their customers. How's someone making the median salary in Bolivia ($3,631/yr) supposed to buy anything but the cheapest gas-burning car?
You got corporations going full cartoon villain too with disinformation campaigns, lies and bribes/lobbying to impede anything regulation that would cut into their profits. Exxon wants to keep selling gas, and the's a lot they can do (and have done) to keep you without any options but gas [1].