Activity for Joshua‭

Type	On...	Excerpt	Status	Date
Answer	—	A: Can there be a space age without petroleum (crude oil)? I think you can, but I can't see any way of doing it short of knowing the end from the beginning. Werrf's answer is excellent in regards to the energy densities of coal and oil that bootstrapped industrialization. Let us say you possessed no coal nor oil but had all of our physics and chemistry text... (more)	—	over 7 years ago