Water supply is the provision of water by public utilities, commercial organizations, community endeavors or by individuals, usually via a system of pumps and pipes. Water-supply sources include both surface water and groundwater.
Modern landfills are well-engineered and managed facilities for the disposal of solid waste. Landfills are located, designed, operated and monitored to ensure compliance with federal and state regulations.
Mining is the process of extracting useful materials from the earth. Mining includes both surface mining, such as quarrying for limestone or strip-mining for coal, and deep mining, which involves excavating shafts and tunnels for the extraction of coal and minerals.