Season 21, Episode 10
Season 21 Episode 2110 | 29m 49s
Pygmy Owls - The tiny northern pygmy owl is found thriving in an unexpected forest. Ocean Acidification - The ocean is more acidic as CO2 emissions rise and shellfish are struggling to survive. Green Roofs - Green roofs are all the rage but inquiring minds want to know: do they really work?
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