This sounds good on paper but it’s hard to imagine implementing it in a meaningful way.
For example, the #1 polluter in the world is the US Dept of Defense. Their crimes against the environment are so devastating and numerous, future generations will never forgive us for allowing it. You’re telling me the ICC would issue ecocide arrest warrants for US generals, secretary of state, and commander in chief?
I wish it would happen, but unfortunately this will probably be applied just like other ICC actions: A cudgel for stronger nations to punish misbehaving weaker nations, while never applying the same justice to powerful nations who misbehave.