The Yale FES doctoral program has a specific track in Environmental and Natural Resource Economics (ENRE).
Website here: environment [dot] yale [dot] edu [slash] groups [slash] enre .
Students usually take the Micro and Metrics first-year sequence with PhD Economics students, and can add on other PhD Economics field courses depending on their research interests. You're pretty much free to pick and choose the rest of your courses at FES. Their main researchers have been William Nordhaus and Robert Mendelsohn, then they have mid-career applied policy people like Matthew Kotchen and Mushfiq Mobarak, and young guys like Kenneth Gillingham and Joseph Shapiro who joined recently. Fairly good place to do ARE, depending on your research interests, I'd say. It's super selective - they only take like max 3 people in the ENRE track each year, and someone on Urch said that they didn't take on any new students last year.