I think part of my point should be taken further that we don’t even have the correct order of magnitude for cats and the numbers for windmills are so small it’s probably negligible although care should be taken to see if there is some disproportionate externalities observable now such as when Australia changed its own ecosystems with changes to farming practices. What isn’t under so much debate though that does unequivocally matter is the amount of land necessary to convert to renewables which is a function of energy density in urban areas where land use is much more expensive and total energy used per area is quite high. While systems do get more efficient over time the efficiency isn’t exponential and portable energy is a big issue that is mostly orthogonal to renewable sources in funding mechanisms yet also part of the incredibly complex energy supply chain of the world economy.