The development that has not taught us how to use natural resources wisely is the: development of market mechanism
development of synthetics
development of science for agriculture
development of machines for mass production

the answer is selfishly. hope this !

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity