This is obviously just speculation but fossil fuels are so effective and cheap I believe every last ounce of it will be mined and burned even at the cost of the annihilation of our species. Our ancestors don’t even exist. Ultimately, we’re not going to be inconvenienced in the present for a future that is not ours. Even if we discover better alternative energy sources (and I don’t think we will) we’ll still use whatever we invent in tandem with fossil fuels. No law, no treaty, no nothing is going to stop it.
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