> open the windows if you prefer fresh air, or you can enjoy much more efficient...

		jakear on Sept 27, 2020 \| parent \| context \| favorite \| on: Cement is the source of 8% of the world's CO2 emis... > open the windows if you prefer fresh air, or you can enjoy much more efficient AC/heat How can something powered by electricity/natural gas/etc be more efficient than simply opening the windows and letting Mother Nature do the work?

poor wording. I mean more efficient than ac/heat in a leaky house.