What is one common method used to reduce hazardous waste in the environment?

Deep well injection is a common method used to reduce hazardous waste in the environment because it involves the disposal of liquid hazardous waste by injecting it deep underground into geological formations that can safely contain the waste. This method minimizes the risk of contamination to the surface environment and groundwater by isolating the hazardous materials from accessible areas, helping to protect human health and the ecosystem.

This technique is regulated to ensure that the injected waste is managed correctly and does not pose a risk to surrounding communities or drinking water supplies. It's considered an effective way of handling liquid wastes that cannot be treated or disposed of through other means. In contrast, landfilling, open burning, and air filtration do not offer the same level of containment or safety for hazardous materials.