Which of the following are the features of Environmental Economics as a field of study ?

A. It has its roots in the theory of externalities and public goods.

B. It is based on neoclassical welfare theory

C. It envisions human economy as a sub-system of the biosphere

D. It engages with the law of transformations of matter and energy

E. It focuses on finding the most efficient ways to reducing environmental damages.

Choose the correct answer from the options given below: