I believe the answer is: when you do something with as little waste as possible
Maximum efficiency is achieved if you manged to obtain the maximum benefit while making the least amount of expense as possible. In managing your daily life, this could be achieved by making sure that your time is spent carefully so it give as little waste as possible.
It ended because China came in and raided their villages.
Answer:
billboards
Explanation:
Four states currently ban billboards: Alaska, Hawaii, Maine and Vermont. It is no accident that these four states are known for their scenic beauty. Businesspeople in these states recognize that an unmarred landscape promotes tourism and benefits them in the long run.