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.
The 1848 Revolutions The wave of political upheavals in Europe originated in France in February of 1848. Almost overnight revolutions sprung up throughout parts of Europe and Latin America. In total, there were over 50 countries that participated in, or were affected by, the 1848 Revolutions.