Charcoal

Material A
Hardwood. Charcoal is simply hardwood that burns to provide a charred taste and smell to the food you are barbecuing. This is easily confused with the mineral, coal.

Disposal: Hardwood must be placed in the garbage bin.

Best Alternative
Charcoal is not exactly environmentally friendly as it is burning, releasing carbon into the atmosphere. What you can opt for is to buy charcoal bags with no added chemicals and to find bags that are recyclable so at the minimum, the waste that you produce can be recycled.