Law360, New York ( September 26, 2014, 1:39 PM EDT) -- Renewable energy is an increasingly vital source of electricity for the modern world. Indeed, the International Energy Agency estimates that such energy will account for 25 percent of gross power production by 2018, rising from 20 percent in 2011. Many countries have implemented legislation to promote the generation of renewable energy. In particular, some nations set targets pursuant to which a certain percentage of electricity generation had to come from renewable energy. They also provided for the purchase of renewable energy on terms favorable to the generator of renewables. However, a significant number of these states later amended their legislation when they considered that these incentives were overly burdensome on them. By way of introduction, three categories of foreign investors have been particularly affected by this legislation and its subsequent reform:...