There are many renewable energy sources to be exploited. Solar and wind power justifiably get the most attention, but they are not the only game in town. There is a growing sustainability movement to capture energy from various kinds of waste, including even the wastewater we flush down the toilet.
The modern face of solar energy is hundreds of thousands of rooftops covered with arrays of solar panels. It is also amazing expanses of solar panels and mirrors covering acres of desert land. Solar power capacity is expanding rapidly and is expected to at least triple over the next 10 years.
Hydraulic fracturing – or fracking – is a well-stimulation technique in which rock is fractured by a pressurized liquid to free otherwise trapped natural gas or oil.