Well, we've gone and done it. We've released tons of carbon dioxide into the atmosphere by flying around the world for vacations, thus increasing global warming, and potentially turning the tourism industry upside down.

The U.N. Environment Program, the World Meteorological Organization and the World Tourism Organization said concerns about extreme weather conditions and pushes to reduce air-travel emissions would persuade tourists to travel less in the future.

Officials believe vacationers from Europe, Canada, the United States and Japan will stay in their home countries to take advantage of longer summers, and that travel from cooler climates to warmer climates will become less frequent as temperatures increase globally. In particular, people will travel less between Europe and the Mediterranean, between North America and the Caribbean, and between northeast Asia and southeast Asia.

Even with the expected decrease in long-distance travel, overall travel demand is still expected to grow between 4 and 5 percent a year.

But the decrease in tourism in warm, tropical areas could drastically affect local economies, where tourism accounts for as much as 40 percent of the economic output - not to mention the change in weather and land from rising temps and seas.