The world currently uses about 13 terawatts  (TW) of energy, and it is predicted by 2050, an additional 10 TW will be required. Not only that, the additional energy required will be have to be carbon neutral. Considering all of this, what is the

用51单片机和MQ－７测一氧化碳，并用ttl输出高低电平测试程序课直接移植使用。-With 51 single and MQ-7 carbon monoxide measurement, and high output with low test program ttl class directly transplanted to use.