I would add technology to your list of things we need to save this planet. And I&#x27;d say it&#x27;s useful to know that making things that burn fossil fuel more efficient is not a viable solution to the problem of global warming.<p>We are now beginning to have good products on the market that are sustainable: electric and solar. Making internal combustion engines more efficient seems a dead end. Or worse - making them more efficient may delay the move to what is actually sustainable.<p>Side note: I regret adding my comment about downvotes. But I will leave it to preserve sense of thread and to remind me not to go there again.