By Reilly Capps How much should a country spend on its military? And how much should it invest trying to power itself? China is answering that question one way. The U.S. is answering it another way. China is, of course, poorer than us. But their priorities are clearly tilted toward trying to power themselves. Even though their economy is smaller, the government invests more on developing clean tech than we do ($65 billion vs. $45 per year, according to one report. Another report ...