Liu says the program helps West African farmers learn organic means of production using compost and natural predators.

VOA: standard.2010.04.11

If the vehicle in the unfortunate circumstances of a collision, has to be able to maintain the security of the hydrogen which means more mass, which means a lot of the efficiency is being squandered What's the environmental impact of hydrogen production?

如果车辆,在碰撞中发生了不幸，要仍然能够保持氢气的安全性的话,意味着需要更多的质量，也就是说大部分效率被浪费了,制氢对环境有什么影响呢？

麻省理工公开课 - 固态化学导论课程节选

"I should say that is rather contradictory." "If you put a lot of subsidy that means the production is not competitive or not cost efficient."

VOA: standard.2010.05.13