Green Science

Green Science is the application of eco-friendly thinking to scientific disciplines. Learn about global warming, pollution and other impacts on nature and the planet, plus what we can do to combat them.


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How Carbon Footprints Work

While actual footprints measure size, weight and speed, carbon footprints measure how much carbon dioxide (CO2) we produce in our daily lives. Do you know how big your carbon footprint is?

How China's Pollution Sniffers Work

In an effort to detect areas with poor air quality, China is training people to sniff out harmful levels of pollution. But what effect does this have on the human body? Learn about how the brain identifies and distinguishes among scents as well as new odor-detecting technology.

What is clean coal technology?

Clean coal -- isn't that an oxymoron? Not anymore. See how energy companies are using coal in cleaner ways to generate massive amounts of electricity. Alternative fuels may be making headway, but coal isn't used up yet. Find out why.

Is global warming destroying Mount Everest?

Mount Everest dangers include an increase in development, tourism, and potential damage from global warming. Read about Mount Everest dangers.

What is a Green Roof?

Green roofs, long popular in Europe, are making their way into the United States. Find out what a green roof is and how it can solve some problems conventional roofs have.

How Bottled Water Works

Bottled water is currently an $8 billion industry in the United States alone, but for a seemingly basic food product, it has its share of detractors. Find out why.

How Wind Power Works

When the wind blows, particles in the gust of air are moving quickly. And that motion carries kinetic energy, which can be captured and harnessed to create electricity. The principle behind a wind-electric turbine isn't too different from an ordinary dam -- only it's capturing wind instead of water.

The Ultimate in All-terrain

It’s no secret that we love cool gadgets and crazy vehicles here at HowStuffWorks, and today Popular Science dished up an article on an especially cool all-terrain motorbike: the Hyanide.

Can we plug the hole in the ozone layer?

The ozone layer prevents much of the sun's ultraviolet (UV) light from reaching the Earth. The bigger the hole in it gets, the more of this dangerous light reaches us. What can we do about it?

Could reversing global warming start an ice age?

When people talk about "the Ice Age," they generally mean the most recent one, but Earth has experienced them off and on for the last 600 million years. Are we on the brink of a new ice age?

What is the greenhouse effect?

We'd be up a creek without Earth's atmosphere and the greenhouse effect it provides, but it turns out that an overactive greenhouse effect can result in a similarly devastating outcome.

What Can I Do About Global Warming?

You hear about global warming all the time on the news. If you wanted to help, what could you do? Well, you could start with a light switch.

How Global Warming Works

Global warming has become a common term, but it’s not commonly understood. Learn about global warming and the greenhouse effect.

How Organic Food Works

Organic food promises freedom from synthetic ingredients. Find out what organic food is, how organic farming works, what the pros and cons are, and why you should care.

How Ozone Pollution Works

We want the ozone layer, but we don't want ozone pollution... Good in the atmosphere but bad on the ground? Find out about ozone pollution, how it affects you and what you can do about it.

How do plants compare to solar cells when it comes to collecting solar energy?

How do plants compare to solar cells when it comes to collecting solar energy? Would you get more power from an acre of ground by putting solar cells on it or by raising plants?

How Landfills Work

What happens to all of that trash the dump truck picks up every week? It doesn't just disappear into a parallel universe: Each day, we all contribute to the local landfill, and the waste disposal system is pretty involved.

How many sheets of paper can be produced from a single tree?

We know that paper comes from trees, but just how much does it take? Let's do the math and figure out how much paper your average tree can be made into.

How can ozone be both good and bad?

During the summer I am always hearing about ozone warnings in my city. This ozone is bad. But then I hear about the ozone layer, which is good. How can ozone be both good and bad?