9.SST (Alternative Energy)
Around the world, renewable energy use is on the rise and these alternative energy sources could hold the key to combating climate change. What is renewable energy? Renewable energy is generated from sources that naturally replenish themselves and never run out. The most common sources are solar, wind, hydro, geothermal and biomass. Over 80 percent of the total energy consumed by humans is derived from fossil fuels. However, renewables are the fastest growing source of energy in the world. Renewable energy has many benefits. First, it can combat climate change because it creates no direct greenhouse gas emissions. The only emissions that they produce are indirect, meaning those that result from manufacturing parts, installation, operation and maintenance. But even those are minimal.