Zhang Yuan reflected upon the past and suddenly realized that, indeed, every advance in civilization had come at the sacrifice of some people.
The two of them talked about the black technologies that had appeared, including nuclear weapons, addictive drugs, and virtual worlds. There was actually another black technology that humanity had overlooked—poisonous fuels.
What are poisonous fuels? They are the propellants used in rockets. From a purely chemical standpoint, the ideal would be fluorine fuels, such as the reaction of fluorine with hydrogen to form hydrogen fluoride, releasing a massive amount of energy.
However, this stuff is extremely toxic! Skin contact with just a few dozen milligrams could necessitate amputation, and a few hundred milligrams meant no hope for survival; one could start preparing for the end.
The fuel for the Long March 5 was about 800 tons. Using fluorine, a single launch could kill hundreds of millions of people.
