AP World History 101. Feudalism and the Crusades Video. Feudalism developed in Western Europe at around 800 C.E. from the remnants of the Western Roman Empire. As a result of central authority being unable to perform its functions and prevent the rise of local powers, this decentralized organization formed.
LEED, which stands for Leadership in Energy and Environmental Design, is a certification program focused primarily on new, commercial-building projects and based upon a points system. The more points you earn, the higher your rating.
Using concrete can help increase the number of points awarded to a building in the LEED system. The following table provides suggestions for earning LEED-NC v3 points through the use of cement and concrete products. The credit categories and the credit numbers are those in the LEED rating system.