Needless to say, this list works on the maximum-welfare principle. Environmental expert Lomborg, in Time magazine’s list of 100 most influential people, does a thorough job of putting together the 10 basic proposals (outlining the challenge and the opportunities/solutions) in the first part, along with two alternative perspectives for each. In the brief second part, eight top economists (including three Nobel laureates) rank the opportunities in each field. Making it one of the most exhaustive reference books on these topics.