We have bitcoin haters and critics that have said bitcoin is contributing to global warming. They did not talk ND do not like to talk about industries and how some countries are generating their energy from fossil fuel which is the main source if the global warming.
Since 2020, 75% of the energy bitcoin mining consumes are from renewable energies, but as mining moved to Kazakhstan that depend on more fossil fuel, this could have been reduced. But still more than 50% of the energy that bitcoin mining still consume are from renewable energy.
It has becoming a time that some mining companies are using wase product of crude oil refineries for generating energy, what would have been burned as a flare before. Bitcoin is also helping to make the waste products to be useful.
Some people are still talking about global warming, it is real and the world is becoming hotter, but not because of bitcoin mining but because of other human activities.
If there is no bitcoin, there will still be global warming.