I think you&#x27;re misunderstanding entropy; it only really applies in a closed system. By using energy from the sun to &quot;decrease&quot; entropy on earth, what you&#x27;ve don&#x27;t is just expand the system to include energy from the sun. You&#x27;ve converted solar energy into kinetic and potential energy (moving things around, ordering them, building walls etc). That transformation isn&#x27;t perfectly efficient - friction, electrical resistance, etc. create waste heat, which disappeared and can no longer be used. You&#x27;ve cleaned up one area of the system (decreasing entropy) but the means you used to do so used more than you gained. Entropy ALWAYS increases.