Newsom says that Glaeser's arguments are similar to those posed in David Owen's 2009 book Green Metropolis; namely, that the best way to save the environment is to live in the city:
"...but Glaeser's policy prescriptions are stronger, if less politically practical. As a free-market economist, he supports both London-style congestion pricing, charging motorists a fee to drive in the center city, as well as a carbon tax, as incentives to use resources more efficiently. He is deeply critical of the home mortgage interest deduction and the federal interstate highway system as subsidies for suburban sprawl."
In other ways, says Newsom, Glaeser's environmental analyses are "shallow."