Question

Scraps and old used metals can be remelted and ...................... for useful purposes.

Answer 1

Scraps and old used metals like aluminium, iron, steel, coper etc. can be melted and recycled into usable forms again and again. This reduces pollution and very less energy is required for melting and recycling of these metals rather than producing new metals from the ores. There is less emission of greenhouse gases. Also, less mining waste is produced and about 40% less water is used in producing metals by recycling.

So, the correct answer is 'recycled'.