Fossil fuels, including coal, oil, and natural gas, contribute to over 60% of the world's energy production and are the top greenhouse gas emitters. Air pollution and accidents from fossil fuel-based ...

Cow manure is an unlikely source of energy that has been used for centuries. Human waste is another surprising source of renewable energy that can be converted into biogas through anaerobic digestion.

The increasing adoption of renewable energy mandates by countries around the world has led to massive investment in the green energy sector, although for now, energy generation in the U.S. is still ...

Forbes contributors publish independent expert analyses and insights. Robert Rapier is a chemical engineer covering the energy sector. NOCHTEN, GERMANY - APRIL 30: In this aerial view the Boxberg coal ...