One of the main reasons that the Three Gorges dam was built was to prevent flooding further downstream. The need for a dam was highlighted in 1954 when people were killed as a result of flooding of the Yangtze River.
Arab Spring refers to the democratic uprisings that arose independently and spread across the Arab world in 2011. The movement originated in Tunisia in December 2010 and quickly took hold in Egypt, Libya, Syria, Yemen, Bahrain, Saudi Arabia, and Jordan.
Arab regimes have been sitting on a demographic time bomb for decades. According to the UN Development Program, the population in Arab countries more than doubled between 1975 and 2005 to 314 million. In Egypt, two-thirds of the population is under 30.ational Appeal of the Arab Spring. The key to the mass appeal of the Arab Spring was its universal message. It called on the Arabs to take back their country away from the corrupt elites, a perfect mixture of patriotism and social message.