The National Environmental Policy Act

The National Environmental Policy Act The National Environmental Policy Act (NEPA), signed into law on January 1, 1970, requires federal agencies to study and document the effects of their actions on the environment. Potential impacts on human health and safety; air, soil, and water quality; ecosystems; cultural and historical resources; land use; and socioeconomics resulting […]  More »

Green Propulsion: Trends and Perspectives

  Green Propulsion: Trends and Perspectives Environmentally friendly alternatives could reduce the risk and cost of propulsion systems. Aerospace has been investigating possible candidates for national security space systems. John D. DeSain The propellants used in space programs pose environmental concerns in four main areas: ground-based impacts, atmospheric impacts, space-based impacts, and biological impacts. Ground-based […]  More »