Waste problem

To the editor:

Methane is the major component of natural gas. It is highly flammable and can form explosive mixtures if it concentrates in an exposed space with poor ventilation. Methane and carbon dioxide (CO2) make up the majority of landfill gas, which is produced when bacteria break down organic waste. Gas production increases if the temperatures or moisture content increases.

These gases can move in outdoor air through windows, doors or ventilation systems. In soil these gases can migrate and enter a building through cracks in basement floors and walls.