In the article, "Earthships," what does passive solar mean? a type of fossil fuel used for electricity

a clean-burning natural gas

the use of the sun's energy for either heating or cooling

a type of pollution resulting from cracking tires

closer examination, however, finds the mcdonald's kind of job highly uneducational in several ways. far from providing opportunities for entrepreneurship (the lemonade stand) or self- discipline, self-supervision, and self-scheduling (the paper route), most teen jobs these days are highly structured — what social scientists call “highly routinized.”  

true, you still have to have the gumption to get yourself over to the hamburger stand, but once you don the prescribed uniform, your task is spelled out in minute detail.