Hot electricity
Power of wood
Alternative technology
Plan for tomorrow
Pressure tactics
Nanogenerators now use pressure to produce electricity
Smart reflectors
Windy ways
A radical wikd turbine is being scaled up
Air power
Riding the wind
Great balls of energy
Under the ocean floor lies an untapped source of energy
Mobile batteries
Restoring power
Sun-powered scooter
Going far
Hot rocks
Geothermal energy is gradually becoming a potential source of electricity
Windward, ho
Making waves
Change in the wind
Wind energy could soon become as cheap as other forms of energy
Umbrella for the Earth