Masters in Business Administration programs in Sustainable Business at top business schools like Stanford, Yale, and Columbia normally require a number of years of business experience as an entrance requirement, but there are a few programs that do not have this requirement. For example:
Bard College MBA in Sustainability
The following link provides a full list of graduate programs in environmental policy, science and management.
www.brown.edu/Departments/Environmental_Studies/documents/ESPrograms.html
While environmental law can be studied at most law schools, the following schools have special, concentrated programs in environmental law.