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An official website of the United States government.

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We've all heard of it, but what is climate change and what is it doing to our planet?

So, what is climate change?

Climate change (or global warming), is the process of our planet heating up.

Scientists estimate that since the Industrial Revolution, human activity has caused the Earth to warm by approximately 1°C. While that might not sound like much, it means big things for people and wildlife around the globe.

Unfortunately, rising temperatures don't just mean that we'll get nicer weather - if only! The changing climate will actually make our weather more extreme and unpredictable.

As temperatures rise, some areas will get wetter and lots of animals (and humans!) could find they're not able to adapt to their changing climate.

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What causes climate change?

1. Burning fossil fuels

Over the past 150 years, industrialised countries have been burning large amounts of fossil fuels such as oil and gas. The gases released into the atmosphere during this process act like an invisible 'blanket', trapping heat from the sun and warming the Earth. This is known as the " Greenhouse Effect ".

2. Farming

Believe it or not, cows' eating habits contribute towards climate change. Just like us, when cows eat, methane - a type of greenhouse gas - builds up in their digestive system and is released in the form of... a burp! This might sound funny, but when you imagine that there are almost 1.5 billion cows releasing all that gas into the atmosphere, it sure adds up!

3. Deforestation

Forests absorb huge amounts of carbon dioxide - another greenhouse gas - from the air, and release oxygen back into it. The Amazon rainforest is so large and efficient at doing this that it acts like our planet's air conditioner - limiting climate change. Sadly, many rainforests are being cut down to make wood, palm oil and to clear the way for farmland, roads, oil mines, and dams.

How will climate change affect the planet?

The Earth has had many tropical climates and ice ages over the billions of years that it's been in existence, so why is now so different? Well, this is because for the last 150 years human activity has meant we're releasing a huge amount of harmful gases into the Earth's atmosphere, and records show that the global temperatures are rising more rapidly since this time.

A warmer climate could affect our planet in a number of ways:
- Shrinking sea ice
How will climate change affect wildlife?

Climate change is already affecting wildlife all over the world, but certain species are suffering more than others. Polar animals - whose icy natural habitat is melting in the warmer temperatures - are particularly at risk. In fact, experts believe that the Arctic sea ice is melting at a shocking rate - 9% per decade! Polar bears need sea ice to be able to hunt, raise their young and as places to rest after long periods of swimming. Certain seal species, like ringed seals make caves in the snow and ice to raise their pups, feed and mate.

It's not just polar animals who are in trouble. Apes like orangutans, which live in the rainforests of Indonesia, are under threat as their habitat is cut down, and more droughts cause more bushfires.

Sea turtles rely on nesting beaches to lay their eggs, many of which are threatened by rising sea levels. Did you know that the temperature of nests determines whether the eggs are male or female? Unfortunately, with temperatures on the rise, this could mean that many more females are born than males, threatening future turtle populations.

How will people be affected by climate change?

Climate change won't just affect animals, it's already having an impact on people, too. Most affected are some of the people who grow the food we eat every day. Farming communities, especially in developing countries, are facing higher temperatures, increased rain, floods and droughts.

We Brits love a good cuppa, (around 165 million cups of the stuff every day!), but we probably take for granted just how much work goes into growing our tea. Environmental conditions can affect the flavour and quality plus it needs a very specific rainfall to grow. In Kenya, climate change is making rainfall patterns less and less predictable. Often there will be droughts followed by huge amounts rain, which makes it very difficult to grow tea.

Farmers might then resort to using cheap chemicals to improve their crop to earn more money, even when long-term use of these chemicals can destroy their soil.

How are people coping with climate change?

Buying Fairtrade products can help make sure a farmer is paid a fair wage. This means they can cover their costs, earn enough money to have a decent standard of living, and invest in their farms to keep their crop healthy, without needing to resort to cheap methods of farming which can further damage the environment.

This support also helps farmers to replace eucalyptus trees - which take up a lot of water - with indigenous trees that are better for the farmers' soil. They can learn to make fuel-efficient stoves which will not only make them a little extra money, but also reduce the carbon footprint of the community - cool!

How can I help prevent climate change?

Small changes in your own home can make a difference, too. Try switching to energy-saving lightbulbs, walking instead of using the car, turning off electrical items when you're not using them, recycling and reducing your food waste.

All these little things can make a difference. You can check out more eco-friendly ideas, in our kids' guide to saving the planet! Plus, check out our cool article about Greta Thunberg, too, to discover how young people are making their voices heard.

You can download information about Fairtrade and climate change for your school, here! www.fairtrade.org.uk/schools.

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What is climate change: facts for kids | National Geographic Kids

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We've all heard of it, but what is climate change and what is it doing to our planet? Climate change (or global warming), is the process of our planet heating up. Scientists estimate that since the Industrial Revolution, human activity has caused the Earth to warm by approximately 1°C.

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What makes cars go? Fossil fuels! What lights up gas grills and stoves? Fossil fuels! What’s non-renewable and really bad for the environment? You know…

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NASA Climate Kids :: The Story of Fossil Fuels, Part 4: Next

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What's next? Hopefully a future with clean, renewable energy.

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The Story of Fossil Fuels, Part 3: Gas

You can find natural gas near oil, coal, and other rocks. It comes from the same natural processes that make coal and oil. It, too, comes from once-living things.

Humans have known about natural gas for a long time. Around 500 BCE, people in China used bamboo shoots to transport natural gas. They used it to boil water.

A famous historian wrote about natural gas between 100 and 124 CE. That's 1,900 years ago. This person wrote about flames burning from the ground of present-day Iraq. But even though people knew about it, it didn't catch on as a major fuel source for some time.

Today, natural gas is often used for cooking and heating homes. It is one of the most important sources of energy in the world.

People once considered natural gas a problem. It was explosive and dangerous. Most oil and coal operations just burned it.

Now it is valuable. Natural gas is cleaner burning than either coal or oil. That means it causes less pollution. Many places have switched from burning coal to burning natural gas. That means many places want more of it.

Since more people want natural gas, people will get it however they can. One way to get natural gas is with something called hydraulic fracturing, or "fracking." Fracking is expensive, but people want natural gas so much, they'll use this method.

Fracking involves injecting water, sand, and chemicals into rocks to break them apart. This releases natural gas. Fracking helps people increase the amount of natural gas we can get.

Sadly, there are environmental concerns over fracking. People worry that these chemicals can get into drinking water.

Fossil fuels form all the time, but that doesn't mean that we won't run out someday. It takes millions of years for coal, oil, and natural gas to form, and we are removing them much faster than that.

Think about it this way: The fossil fuels we have used over the past 200 years formed over the past 500 million years. It's like we're emptying a bathtub with a huge drain while refilling it with a tiny, slow drip. Even with the drip, the tub will still empty completely.

Some scientists think we are getting close to being halfway through all that fuel. It's hard to know exactly how much remains because the technology we use to get these fuels from the ground is always changing.

Still, no new inventions will get around the fact that, at some point, there will be no more fossil fuels left.

What does
CE mean?

CE stands for "Common Era." It's the time that we're counting in years. When we say it's 2015, we're saying it's the 2,015 th year in the Common Era. We put "CE" after a year that was so long ago you might not even realize it's a year.

What does
BCE mean?

BCE stands for "Before Common Era." It's counting backwards from the year 0. That means that 500 BCE was 2,015 + 500 years ago, or 2,515 years ago.

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The Story of Fossil Fuels, Part 3: Gas You can find natural gas near oil, coal, and other rocks. It comes from the same natural processes that make coal and oil. It, too, comes from once-living things. Humans have known about natural gas for a long time.

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The Story of Fossil Fuels, Part 2: Oil

Early one August morning in 1888, Bertha Benz left home with her two sons on a 66-mile trip to visit her mother. She took a brand new car. She didn't tell anyone. That car just happened to be her husband's Benz Patent-Motorwagen-the first true automobile.

This trip wasn't really about visiting Bertha's mother. Bertha was frustrated with her husband, Karl Benz. Karl had an incredible invention, but he hadn't been doing a great job of letting people know about it. Before Bertha set out on this trip, Karl had only given short demonstration rides, and there was always a team of mechanics standing by.

Bertha's trip was the first long-distance car ride ever attempted. It was a great success. Bertha acted as her own mechanic. She came up with makeshift brake pads. She cleaned all the fuel pipes. And, like anyone else on a long road trip, she had to fill up with gas. She did so by purchasing a fluid called benzene from a local pharmacy. This pharmacy became the world's first gas station.

Petroleum is a liquid that comes from oil. We put it into our cars to make them run. Petroleum means "rock oil." It comes from the remains of once-living organisms, just like coal.

People have used petroleum for different purposes throughout history. But petroleum wasn't used very much until another invention came along-the internal combustion engine.

In 1863, a man named Nikolaus Otto created the first successful engine of this kind. Unlike a steam engine, in Otto's engine, the heat comes from igniting fumes from a petroleum liquid. The pressure from the heat moves pistons. This is pretty much how all gas-powered cars still work to this day.

A lot of different names are tossed around for liquid fossil fuels. Do they all mean something different? Here's a brief explanation:

Petroleum is a collection of liquids formed from once-living things. It is a mixture of chemicals that contains carbon and hydrogen. People can also refer to petroleum as crude oil and sometimes just oil.

But you can't pour that black sludge of oil into a car. You need to get specific chemicals out of the oil. Gasoline is what we usually put into our cars. It is one set of chemicals (with a couple of other added ingredients).

Kerosene is another set of chemicals used to heat homes and to cook. It is also the main ingredient in jet fuel!

The process of removing these chemicals from the oil, called "cracking," occurs at an oil refinery.

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The Story of Fossil Fuels, Part 2: Oil Early one August morning in 1888, Bertha Benz left home with her two sons on a 66-mile trip to visit her mother. She took a brand new car. She didn't tell anyone. That car just happened to be her husband's Benz Patent-Motorwagen-the first true automobile.