WEBVTT

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(MUSIC)

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JOAN CARTAN-HANSEN,

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HOST: THE EARTH'S CLIMATE HAS

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NATURALLY CYCLED THROUGH CHANGE.

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BUT IN THE PAST FEW HUNDRED

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YEARS, THE EARTH'S TEMPERATURE

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HAS INCREASED TEN TIMES FASTER

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THAN THE AVERAGES FOUND IN THE

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PAST.

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97 PERCENT OF CLIMATE SCIENTISTS

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THINK THE EARTH'S WARMING IS DUE

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TO INCREASING LEVELS OF CARBON

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DIOXIDE IN OUR ATMOSPHERE.

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THE MORE CARBON DIOXIDE IN THE

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ATMOSPHERE, THE MORE HEAT FROM

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THE SUN GETS TRAPPED AND THE

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HIGHER TEMPERATURES GO.

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AND THAT CAUSES ICE SHEETS TO

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SHRINK, GLACIERS TO DISAPPEAR,

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AND OCEANS TO BECOME MORE

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ACIDIC.

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THE AMERICAN PIKA CAN DIE IF

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IT'S EXPOSED TO TEMPERATURES

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WARMER THAN 78 DEGREE

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FAHRENHEIT.

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SO, THEY HAVING TO CLIMB TO

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HIGHER HABITATS TO STAY COOL.

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BUT WHAT WILL HAPPEN WHEN THEY

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RUN OUT OF MOUNTAIN?

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HUNDREDS OF PLANTS AND ANIMALS

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HAVE ALREADY BEEN AFFECTED BY

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CLIMATE CHANGE.

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SO, CLIMATE CHANGE CAN PUT

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HABITATS IN DANGER.

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FOR MORE INFORMATION ABOUT

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HABITATS CHECK OUT THE SCIENCE

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TREK WEBSITE.

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YOU'LL FIND IT AT

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IDAHOPTV.ORG/SCIENCE TREK