Alternative fuel sources for automobiles, trains and airplanes include cooking grease, plant stalks, algae, hydrogen and sunshine.

Renewable energy sources, including wind, geothermal and water, are examined.

Following researchers as they attempt to predict the future of Earth's weather. Also: engineers and technicians who have ingenious ways to counter meteorological disasters.

Eco-conscious construction techniques by environmentally aware builders, scientists, architects and designers

Methods to produce energy are examined.