system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Did we tap into green energy at the earliest possible opportunity? Or did we delay it, and there was actually a possibility to start exploiting it much earlier?
gpt
Technically, we started out using green energy, since we didn't have the means to do anything else! We were using renewable sources like, well, Human labour, then animal labour, and we've been using wind and water to power stuff for ages and ages, before we discovered other means.