I don't really get what you are saying, but the calculation for CO2 emissions per block is basically this: reward_per_block * price = value_per_block cost_per

I don't really get what you are saying, but the calculation for CO2 emissions per block is basically this: reward_per_block * price = value_per_block cost_per_hash * avg_hashes_to_find_block = cost_per_block cost_per_hash is the cost of electricity and mining hardware . If value_per_block > cost_per_block, mining is profitable and more miners will join the network, increasing avg_hashes_to_find_block, until value_per_block == cost_per_block. co2_emissions = avg_hashes_to_find_block * co2_per_hash. So the emissions are a function of the price of bitcoin and the price of (electricity + mining hardware).