Here is a summary of the fields of the PhD job market candidates at the 'top' econ programs this year.
Since most environmental economists are really public economists trained in applied and theoretical micro and econometrics, I'm going to go ahead and group Micro Theory (26), Econometrics (14), Public (12), Applied Micro (11) and Environmental (8) under the Env-Econ umbrella and claim Env-Econ is really the top field (71).