HBT Household batteries. It produces toxic fumes when burned. Often referred to as No.2 Plastic. Relatively valuable types of paper such as computer printout, white ledger and tab cards. The substance which results from decay of plant or animal matter.
Biodegradable matters form humus as they decompose.
HZW Hazardous waste. A concept promoted by opponents of waste to energy systems, whereby municipal recycling efforts target all recyclables in the waste stream. KFT Kraft paper. LB Light bulbs. Low density polyethylene .