Environmental Science

The environment is truly a thing of beauty and should be protected whenever possible. What can we do to save the environment, and what new technology is available to help us?

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How Recycling Works

Recycling is a pretty simple concept: take something that isn't useful anymore and make it into something new. Learn about the process and the good and bad of recycling.

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.

Should we be worried about the dead zone in the Gulf of Mexico?

The dead zone, caused by massive amounts of algae growth, is a vast area off the Gulf of Mexico that is deadly to marine life. How is human activity making the dead zone worse?

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 can a lake simply disappear?

A lake in South America has disappeared and has left scientists wondering where all the water went to. Is it possible that a lake can abruptly vanish?

Will there be farms in New York City's skyscrapers?

Vertical farming is a method of large-scale farming in an urban environment. Learn about the benefits of a vertical farm and vertical farming technology.

How can parts of Canada be 'missing' gravity?

For more than 40 years, scientists have tried to figure out what's causing large parts of Canada to be "missing" gravity. The force of gravity around Hudson Bay is lower than surrounding areas. Learn about two theories that may explain the phenomenon.

How Maps Work

It's no secret that maps are handy. If you get lost, a map can help you find your way. Maps are representations of data that can describe nearly anything about the world. Find out how map data is gathered and how maps are made.

What's a beer battery?

Scientists working with Foster's Brewing Company have made a fuel cell using bacteria and the brewery's waste water. They claim that their fuel cell generates non-polluting power as it cleanses the water. But is the "beer battery" simply a novelty?

How DEPTHX Works

What would you need to explore an ocean on Europa, one of Jupiter's moons? Among other things, you'd need a submersible vehicle to explore the ocean and relate findings back to Earth. Stone Aerospace is developing just such a vehicle: the DEPTHX.

How Plasma Converters Work

In "Back to the Future," Doc Brown throws garbage into Mr. Fusion, powering his time machine. We might be closer than you think to generating electricity for our homes using trash.

What is a geomagnetic substorm?

On February 17, NASA launched a rocket with a record-setting five satellites onboard. The $200 million mission is to discover the source of an atmospheric phenomenon known as the geomagnetic substorm.

What's going into Norway's 'doomsday vault'?

While some of us are stocking up on duct tape and bottled water, the government of Norway is preparing for the event that doomsday leaves some long-term survivors who need to rebuild. The Arctic vault in Svalbard is preparing for the worst case scenario.

What if there were no gravity on Earth?

Have you ever wondered what would happen if we were able to flip a switch and turn the Earth's gravity off for a day? The end result may surprise you.

How do facilities store hazardous waste?

Hazardous waste disposal is an ongoing struggle that's monitored by the EPA. How is meant to be disposed of, and what happens when something goes wrong?

What did this year's winners of the Nobel Prize in medicine discover?

The co-winners of the 2006 Nobel Prize in medicine are two U.S. scientists who discovered a process called RNAi.

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.

How AC FOX Works

Manufacturers -- whether they make corn ethanol fuel, biodiesel fuel, pancake syrup or even frozen pizza -- produce waste and polluted water. Now there's a completely new process called Activated Carbon Facilitated Oxidation, or AC FOX that can handle water that is polluted with organic material. Learn all about AC FOX.

How the Earth Works

Even though it's tiny compared to the rest of the universe, the Earth is enormous, and it's extremely complex. Systems powered by the sun are able to sustain the various life forms living on Earth. Learn what ties all the parts of the Earth together.

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?

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