Started my degree in 92 and it was pretty widely accepted then - moving it from academia to the wider public was the next phase.
Does remind me of a conversation I had with my friend's dad - he was conservative and seeing me with long hair and hippy attire set him off on a rather heated diatribe about environmentalists. But, as we shared a bottle of single malt, it soon became clear that we actually agreed on far more than we disagreed. I used fisheries as an example (this was in Aberdeen) and found he was fully onboard with sustainability and taking only what the environment could support - better for the long term economy as well as the environment. As an engineer, he was a big supporter of wave power.
A couple of things stuck in my head - firstly, that there is always a middle ground and that letting the extremes dominate the debate is counterproductive. I am not a fan of climate change deniers but think that the people at the other extreme cause just as much damage. That stayed with me and I am happy to criticise my own 'side' if I feel it is needed (I detested Al Gore
)
Secondly, he warned that greedy people would find ways to subvert environmentalism and use it as a Trojan Horse for their own benefit. Thirty years later, he has been proved right IMO. Too many wealthy people see the environment as a marketing tool for a spot of virtue signalling, or use it as an 'accounting tool.'