Generating energy from renewable sources

Sun is the primary source of energy. Sunlight is a clean, renewable source of energy. It is a sustainable resource, meaning it doesn't run out, but can be maintained because the sun shinesalmost every day.

Solar energy is captured in a variety of ways, the most common of which is with photovoltaic solar panels that convert the sun’s rays into usable electricity.

Solar technologies can harness this energy for a variety of uses, including generating electricity, providing light or a comfortable interior environment, and heating water for domestic, commercial, or industrial use.

As a result , we can capture energy from the sun and change the energy to the form that we need ( as electric , thermal ..etc) ,and we can operate technologies using solar energy without hurting the environment .

Human power used to be all the rage.150 years ago, products that relied on human energy such as the bicycle, pedal-powered The bicycle is a great way of using human power in a way that allows us to exercise , transport ourselves and save on the consumption of conventional energy at same time.

Generating power from people’s normal activities such as walking is known as parasitic harvesting. One example of this in action is the nPowerPEG, a handheld tube-shaped device that clips to your belt and backpack and generates electricity as you move around, using a magnet weight, spring, and inductive coil. This doesn’t produce enough power for high wattage electronics such as laptops and tablet computers, but better energy efficiency and battery technologies mean the concept has great potential.