No! They actually knew, after all, since ancient times, hunters spared the mother beasts during hunting, and fishermen wouldn't go out to sea during the fish spawning season.
Although they didn't understand the various rules and regulations that appeared in written form, they did know from the experience handed down from their ancestors that random deforestation had negative effects.
But when they went through the mini ice age, they weren't even sure they could survive, who would care about what impact their actions at that time would have in the future.
After all, most people, under normal circumstances, would subconsciously choose the option that was to their advantage.
The same goes for now, even though some have spoken out about the harmful effects of indiscriminate emissions, most people are aware that what is being said is correct, but their final choice is still to do the opposite.
