Unless the aliens plan to travel to earth on flying carpets powered by groovy love and destroy us by throwing their hippie sandals at us, then surely they must also possess advanced technology and some kind industry and would't see our industrial and technological civilization (and reject all industry/technology in general) as "pollution" and "earth destroying".
Unless the aliens plan to travel to earth on flying carpets powered by groovy love and destroy us by throwing their hippie sandals at us, then surely they must also possess advanced technology and some kind industry and would't see our industrial and technological civilization (and reject all industry/technology in general) as "pollution" and "earth destroying".