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"Schools Global Footprint is a teaching resource that helps you to explore and to reduce the environmental effect your school has on the planet. The global footprint calculator is a great tool for helping you reduce your schools' ecological footprint by taking action on six topic areas including: energy, transport, food, waste, water and buildings."

"Our climate is changing. The planet is warming faster than at any time in the last 10,000 years. Global average temperatures have risen by 0.8ºC since the late 19th century, and 0.2ºC per decade over the past 25 years. Man-made greenhouse gas emissions have caused, and continue to cause, most of the observed temperature rise since the mid 20th century. Millions of tonnes of greenhouse gases are produced every day by human activity. These constant emissions into the Earth's atmosphere continue to drive global warming. "

"Gravity satellite yields 'Potato Earth' view" 31 March 2011 Last updated at 15:27 GMT

Helping you to understand Chemistry"

Optical illusions Can you believe your eyes? Stretch your brain with these mind-bending illusions.

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