Unless you've been living in a cave, you'll know about how global warming is affecting our planet.
Much of the world runs on fossil fuels - namely oil and coal - which release carbon dioxide, or greenhouse gases, when burned.
The resulting fumes are blamed for heating up our atmosphere, causing the climate to change and melting the ice in the polar regions.
There are no easy solutions to solving the world's energy challenges, but 'green' energies such as wind and solar power offer alternative forms of energy and produce no greenhouse gases.
The Hymini is a portable power generator that uses a wind turbine to generate electricity.
Using various adaptors, that electricity can then be transferred to your portable devices.
The Hymini supports most popular mobile phone charging slots, as well as popular brands of MP3 players and digital cameras.
The Hymini is designed to fit in your hand, and can be mounted on a bicycle, in a car, or even outside your window.
You need a wind speed of at least 9 miles per hour (mph) for it to work. With a wind speed of 19 mph, a 20-minute charging session will create enough electricity to power an iPod for 30 minutes.
The Hymini is expected to go on sale in the next month at US$50. Buy direct from the company's website at www.hymini.com
Pros: free electricity, portable power source, 'green' status
Cons: you have to spend energy running or cycling to make the fan move (it really turns your own energy into electricity)
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