All aluminium cans are collected for recycling. Aluminium does not degrade during the recycling process and can be recycled endlessly unlike many other materials. Aluminium is also the most cost-effective material to recycle. Recycling scrap aluminium requires only 5% of the energy used to make new aluminium, producing 95% less air pollution. Tiwai Smelter – which produces new aluminium in NZ, consumes 14% of New Zealand’s power Aluminium cans are baled and then sent to scrap metal dealers.