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.
LEED CREDENTIALS. Every story about a LEED building is a story about people. Thatâs why LEED professional credentials are at the heart of the green building movement. Join a community of over 235,000 individuals who have already earned their LEED Green Associate, LEED AP or LEED Fellow credentials. Learn more.