Way before 2008. I can legit remember a bunch of scientists on tv standing next to the Colorado River in the early nineties saying this shit is unsustainable given like 8 states all feed off it to varying degrees. They were already getting way less melt then from the lesser snowfalls.
I loved the Bellagio fountains and golfed every day, so it isn’t like I was part of the solution, but human nature is such that no one is going to alter anything until it’s almost too late.