Scientists differ over degrees of global warming and the specific risks it may pose, but no matter how you look at it, it's happening, and how we travel could have an effect. he July/August issue ...

As the planet experiences global warming, climate changes will express themselves most obviously through water—with scientists predicting increased periods of drought and flooding, melting ...

If we keep burning fossil fuels indefinitely, global warming will eventually melt ... story appears in the September 2013 issue of National Geographic magazine. The maps here show the world ...