Question: what are the four main kinds of recyclable materials?
Answer: Glass. Most household glass can be recycled over and over again; just rinse or wash out the container and recycle. ... 
Metals. Metal food and drink cans made from aluminum or steel are recyclable, and aluminum cans in particular are very valuable. ... 
Organics. ... 
Paper. ... 
Plastics. ... 
Textiles.