Even if it was dinosaurs, the dinosaurs weren’t harvested, much less exploited, in any way. They died of natural causes. Hell, even if the aliens decided to farm them and we used what remained it still wouldn’t be exploiting them since it’s more akin to scavenging.
Oil is actually primarily formed from algae, not dinosaurs, so it should qualify.
Coal is plant matter, so it also qualifies.
Even if it was dinosaurs, the dinosaurs weren’t harvested, much less exploited, in any way. They died of natural causes. Hell, even if the aliens decided to farm them and we used what remained it still wouldn’t be exploiting them since it’s more akin to scavenging.