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What is climate change?
The Earth is warming up - but why is it happening and is it really our fault? The Earth’s climate does not stay the same, it has changed a lot over...

Engineering the Earth's climate
Can large-scale projects to change the Earth's atmosphere help us to combat global warming? Injecting sulphur into the atmosphere, covering the ocean...

How to be energy sustainable
With fossil fuel reserves expected to run out completely in 160 years and the growing threat of climate change, we need to embrace greener and more sustainable...

Solar panels
Did you know? Photovoltaic cells produce electricity directly from sunlight. They produce sustainable energy which is clean and reliable, without consuming...

Solar thermal power
The sun can provide us with energy in three main ways. Solar thermal power is one of these. One of the largest solar thermal power plants currently in...

Solar power tariffs
Solar power has already been proved to be a money-maker. In the UK, the government is making it cheaper to install photovoltaic cells so that we can...

Passive solar air and water heating
Passive solar air and water heating is similar to what happens in a car on a hot day. The heat from the sun warms up the air in a car. This idea can...

How do wind turbines work?
Wind turbines use the energy from the wind to generate electricity. Turbine blades capture the wind and turn. The mechanical energy from this movement...

Solar power dye
New dyes could turn glass into super-efficient solar panels. A team of American scientists have invented a dye that, when painted onto glass, can harness...

What is solar power?
Did you know? Sunlight travels to the Earth in approximately eight minutes from 93,000,000 miles away, at 186,282 miles per second The sun is 109 times...

Solar power
The sun is the original source of almost all the energy used on Earth. It provides the energy that drives our weather systems. At the same time, trees...

What is wind power?
Wind energy is one of the lowest-priced renewable energy sources An average wind speed of 14mph is required to convert wind energy into electricity The...

Wave energy
Anyone who’s ever tried to defend a sand castle against the onslaught of a rising tide will understand the enormous energy carried by the waves. It...

What is wave energy?
Ocean waves are one the most powerful forces know to man. Even though almost 75% of the Earth’s surface is covered with water, waves are a largely unexplored...

Ocean thermal energy conversion
Don’t be fooled by the complicated name, Ocean Thermal Energy Conversion or OTEC is actually one of the simplest types of renewable energy. OTEC uses...

What is tidal energy?
Did you know? Tidal energy is one of the oldest forms of energy. Tide mills, used on the Spanish, French and British coasts, date back to 787 A.D The...

Tidal barrages
Barrages can be used in places where the tide moves in and out, and the difference between the high and low tides is a least five metres. There is only...

Tidal stream generators
Tidal streams are fast moving sections of water caused by the motion of the tide. These usually occur in shallow water. How does it work? Tidal stream...

What is hydroelectric power?
Did you know? Hydro energy was first used by the Ancient Greeks through waterwheels. These powered and turned large wheels which would grind their wheat...

Hydro energy from dams
The biggest dam in the world is the Three Gorges Dam in China. When this is fully functioning it will produce 22,500 MW (megawatts). How does it work?...

Hydro energy from pumped storage
Pumped storage reservoirs provide a place to store energy until it's needed. There are fluctuations in demand for electricity throughout the day. For...

What is geothermal energy?
Did you know? Geothermal energy is almost 100% efficient Geothermal energy supplies less than 10% of the world’s energy At 3,000 km deep, the Earth’s...

Turning hot water into energy
There are two ways to use hot water as a sustainable energy: Heating buildings Firstly, you can use the hot water for heating in buildings; this is known...

What is waste-to-energy?
Did you know? Each year the average family throws away 1.5 tons of rubbish. That's like throwing half an elephant onto a landfill site There are 13 waste-to-energy...

Waste-to-energy pros and cons
It makes a lot of sense using waste-to-energy however, it's worth considering the disadvantages too. Read on and make up your own mind. Advantages of...

Incineration and sustainable energy
When it comes to waste disposal the UK has been labelled the dustbin of Europe, burying more household waste in landfill than any other EU state. According...

Hydrogen and sustainable energy
For environmental scientists, hydrogen is the best thing since sliced bread when it comes to sustainable energies, but why? Why hydrogen? It is the most...

Hydrogen myths
It has been hailed as a clean energy of the future but hydrogen fuel remains one of the most misunderstood of sustainable energies. Here we sort fact...

How can we save the planet?
Climate scientists have worked with the public to draw up ideas to save the planet from climate change. Find out what the top six are below. Inventors...

Wacky sources of sustainable energy
Who would have thought mad inventions like chip fat-fuelled cars and solar-powered fridges could become real products?

Good greenhouse gas
Dutch engineers have discovered how to use carbon dioxide coming from oil production to fertilise commercial greenhouses. We know that energy sources...

Are biofuels damaging to health?
US scientists have warned that biofuels could be more harmful to health than petrol, increasing deaths from respiratory problems and asthma attacks. Biofuels...

Are vegetarians better for the environment?
You may think they’re tasty, but burgers could be doing more harm than you think. They’re not just clogging your arteries, they could also be contributing...

Food-fuelled racing car
With a steering wheel made from carrots and a body made from potatoes, the ecoF3 may sound more like a meal on wheels than a racing car. Thanks to an...

Fake trees fight global warming
In the rush to prevent global warming, scientists have come up with a novel way of ‘cleaning’ the environment. Wallace Broecker, the man who coined...