It seems unfair to blame on data centers alone. We, being a product’s manufacturer or consumer are already the main sources of pollutions. You see lots of mobile phones & PC-related products become junks in short periods not because they are damaged. They are discarded just because of endless greed for materials and ownership. Billions of electrical apparatus are not switched off (each consuming 5W standby or so all day long !). If human civilization had an end, I believe human greed is likely the biggest destroyer.