ask at this point, is energy consumption is really that huge of problem?
"Green" or "Renewable" energy comes from natural sources such as sunlight, wind, rain, tides, plants, algae and geothermal heat. These energy resources are renewable, meaning they're naturally replenished. In contrast, fossil fuels are a finite resource that take millions of years to develop and will continue to diminish with use.
For example:
Solar Power (Solar Panels)
Wind Power (Wind Turbine Propeller)
etc.