The plastics themselves are extremely energy-rich – they have a higher calorific (8)______ than coal and one (9)______ of ‘recovery’ strongly favored by the plastic manufacturers is the (10)
The plastics themselves are extremely energy-rich – they have a higher calorific (8)______ than coal and one (9)______ of ‘recovery’ strongly favored by the plastic manufacturers is the (10)______ of waste plastic into a fuel.
A. conversion
B. melting
C. change
D. replacement