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.
What is ESD? ESD stands for ElectroStatic Discharge. Static electricity is an everyday phenomenon - there can be few of us who have not experienced a static shock after walking across a room and touching the door knob, or on getting out of a car.