Renewable energy accounted for only 8% of global energy consumption in 2009, with the remaining 92% coming from nonrenewable resources that will be depleted within 100 years. The world's population grew from 6 billion in 2004 to 7 billion in 2011 and is projected to reach 8 billion by 2025. This steady population increase will accelerate the depletion of fossil fuels needed for survival, highlighting the urgent need to transition to renewable sources.