Imagine you had a very nice Bitcoin farm with voltage V and R = Ro at room temperature at T=20C. When you start your farm power will be dissipated, heating the copper and the environment. Say you need 120 kJ to heat your room by 1C. How long does it take to break the Paris agreement of 1.5C in your room when your farm is just made out of 3 laptops with 1 on a V = 120V socket?