It shall be the policy of the Commonwealth (i) that the Commonwealth should encourage pollution prevention activities by removing barriers and providing incentives and assistance, and (ii) that the generation of environmental waste should be reduced or eliminated at the source, whenever feasible; environmental waste that is generated should be reused whenever feasible; environmental waste that cannot be reduced or reused should be recycled whenever feasible; environmental waste that cannot be reduced, reused, or recycled should be treated in an environmentally safe manner; and disposal should be employed only as a last resort and should be conducted in an environmentally safe manner. It shall also be the policy of the Commonwealth to minimize the transfer of environmental wastes from one environmental medium to another.