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Tree pollens are in the air

Tree pollens are in the air

Mulberry, olive, Italian cypress, palo verde — the trees’ names are pleasant enough, but the pollens they produce could lead to a sniffling, sneezing spring for some Tucsonans.

March 24, 2014 12:00 am Photos

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The hearing of a dog is more sensitive than humans.

Dogs can hear much higher frequencies, which is why they respo…