It's hard for me to take environmental risks regarding AI very seriously as well (and this is coming from someone who chooses to not drive or own a car, in large part for environmental reasons).
The recent efficiency gains in AI have been unparalleled in the history of computing as far as I know. We often point at how a single computer used to occupy an entire room, and over the course of decades of progress, are now wildly surpassed by computers that fit in our pocket. Inference of frontier language models that used to occupy entire data centers earlier this year (Claude Opus 4.6) are now comfortably surpassed in capability by models that can run on a single high end consumer grade gaming PC. I predict data center construction will collapse not just due to pushback from people who hate them, but also lack of demand from people who actually do use AI. People who like AI tend to like running their AI at home, and now they can.
The most important risks in AI right now are the social ones you mentioned. How does the economy evolve? How do we take advantage of this to maximize joy and love? Perhaps most importantly: how do we avoid (incentivize against) falling into a techno-dictatorship?