*We have BW Hill’s ‘multiplier’ effect, where a one unit increase in the energy spent producing energy requires a 5X reduction in work in the general economy, and perhaps BW Hill’s number should really be 8X to reflect Laitner’s comprehensive studies (because we waste 85 percent); *...
There are many historical examples of societies that found a way to greatly increase food supply (for example, by clearing land for new fields, or by learning to use irrigation). Peter Turchin and Sergey Nefedof researched the details underlying eight agrarian societies of this type, documenting...
C.The author entered the operating room 14 years ago, which indicates the place where the story happens D.The author writes this text to express such an opinion: the love between the stranger and her is blind to race, color and creed and will last through time 点击查看答案 第6题 One ...
C.The author entered the operating room 14 years ago, which indicates the place where the story happens D.The author writes this text to express such an opinion: the love between the stranger and her is blind to race, color and creed and will last through time 点击查看答案 第6题 One ...