Environmentalism and real estate may be strange bedfellows, but current advances in technology are now starting to promote green building. Green building is the practice of creating structures and using practices that are environmentally friendly and resource efficient. There are a number of green building standards that builders and developers can use to certify whether a particular structure is a green building. These standards include the Leadership in Energy Efficiency and Design (LEED) rating system, which is a nationally accepted standard developed and administered by the U.S. Green Building Council. Many of these standards use a system that assigns points for a variety of practices and certify a building at various levels of “green“ depending on the number of points acquired. Energy conservation, water conservation, sustainable site selection, building material conservation, and enhanced occupant health is an integral part of green building. Green building practices tend to increase up-front construction costs but often provide long-term benefits that may offset these increases.