Waste created by man can be classified under Heading X (eg torn book, mouldy bread, rotten apple) and Heading Y (plastic bag, biscuit tin, broken bulb). What is Heading X and Heading Y?

Answer 1

Compostable materials
Non-compostable materials ?

Answer 2

Here, where I live X would go in the Garbage bin while Y would go in the Recycle bin. Perhaps that will give you a clue, about biodegradable, etc.?

Sra

Answer 3

a ship sails at an average speed 30km/h for 2 days. How far has the sip traveled