30.Your uncle owns a calenderia or eatery. Every day, his business yields a lot of leftover foods, vegetable peelings and other wastes. What is the best project he can do to make these wastes useful and sustainable in his business?
A. Build backyard compost pit B.Compost organic materials as fertilizer C.Use the leftover as animal food for the pigs D. Install biogas equipment and use the waste for fuel
