Concise and useful summary with some helpful case studies and simple explanations of abatement vs damages. Simplification meant there was a fair amount of discussion of cost vs benefit "to society" without enough analysis of distribution for my taste. Whole book had a slightly defensive tone and you can see the poor guy is fed up with economists being painted as the bad guys who make everything about money and want to assign everything a monetary value, when the sad fact of the matter is that everything is ALREADY about money and if we don't assign something monetary value then to all intents and purposes it has no value at all.