rafting the colorado is a breath-taking experience, it s a slow and sometimes bumpy ride through ancient time at a moment when it seems like the earth s clock is speeding up. even here the effect of climate change, rapid growth and water overconsumption are threatening the very existence of this river. we boat through cataract canyon, it s the best roller coaster in north america. class 5 rapids all the way down when it s high water and yet my most dangerous part of my job is when i get to this ramp. it s extremely dangerous. reporter: the river has shrunk so much that it s nearly impossible for colorado river guides like this man to pull boats out of the you have guides putting roller tubes underneath boats. as that boat is pulled up, guides are running and putting tubes under until we get to flat land on top like ancient
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Colorado-river
Effect
Breath-taking-experience
Earth
Growth
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Clock
Climate-change
Southwestern-u-s
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River