Answer:
The new way to produce electricity will increase the industrial output the enviroment can support. Thus, the PPF will expand as the opportunity cost in clean enviroment decreases
However an enviroment is either clear or not clean, there isn't more "clean" so it will not expand on the X axis.
Step-by-step explanation:
The enviroment will decrease at more industrial output.
As we cannot live in an eviroment at zero habiltability we will never shift to complete industrial output.
But, at more insdustrial output we produce, more will it effect the envorement.