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Why Is It Colder at the Top of a Mountain Than It Is at Sea Level?
science.howstuffworks.com/nature/climate-weather/atmospheric/question186.htm
Air temperature is colder on top of a mountain than at sea level, but if heat rises how is this possible? Learn about air temperature in this article.
What 'An Inconvenient Truth' Got Right (And Wrong) About Climate Change
Now that its sequel is out, where did Al Gore's landmark environmental documentary hit the mark? What did it get wrong?
How Carbon Offsets Work
science.howstuffworks.com/environmental/green-science/carbon-offset.htm
Carbon offsets are a form of trade that funds projects that reduce greenhouse gas emissions. Learn about carbon offsets and carbon offset programs.
10 Most Deceptive PR Campaigns in History
money.howstuffworks.com/10-deceptive-pr-campaigns-in-history.htm
Diamonds are rare? Not really. They became an engagement ring staple, thanks to a clever, if deceptive, public relations campaign.
How Polar Bears Work
animals.howstuffworks.com/mammals/polar-bear.htm
Polar bears are iconic for their shocking whiteness, ferocity and sheer size. Learn about polar bears, polar bear diet and polar bear habitat.
How do they measure sea level?
science.howstuffworks.com/environmental/earth/oceanography/question356.htm
How do they measure "sea level"? Is it the average of the tides? And is the sea level actually rising or not?
Could a gamma-ray burst wipe out all life on Earth?
science.howstuffworks.com/gamma-ray-burst-life-earth.htm
When a huge star collapses, it releases massive amounts of radiation in concentrated streams. If one of those streams hit Earth, it wouldn't be pretty. But where should we put "gamma-ray bursts" on our list of anxieties?
What Is a Glacier? Everything to Know About These Ice Masses
science.howstuffworks.com/environmental/earth/geophysics/glacier.htm
Glaciers are rivers of ice and are the largest moving objects on Earth. Learn about glaciers and find out how much freshwater are frozen in glaciers.
The Sahara Desert Is Getting Bigger
science.howstuffworks.com/environmental/earth/geology/sahara-desert-is-getting-bigger.htm
Deserts around the world are slowly expanding. HowStuffWorks checks out the science behind these increases in size.
Could Planting 1 Trillion Trees Counteract Climate Change?
science.howstuffworks.com/environmental/conservation/issues/planting-trillion-trees.htm
Many scientists say that the response to climate change will require planting new trees. A whole lot of them.