The EPA said it is working with Federal Emergency Management Agency and the Texas Committee on Environmental Quality to monitor air quality in the area.

WSJ: Fertilizer-Storage Risk Is Often Overlooked

Examples of preventive conservation are: appropriate measures and actions for registration, storage, handling, packing and transportation, security, environmental management (light, humidity, pollution and pest control), emergency planning, education of staff, public awareness, legal compliance (source: ICOM-CC definition).

UNESCO: CULTURE

The October 6, 2001, memo states that the city Office of Emergency Management -- called OEM -- and the Department of Environmental Protection -- referred to as DEP -- disagreed over the air quality following the September 11, 2001 terror attacks.

CNN: Memos: NYC told Ground Zero air was unsafe