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seal pup

BLOWN AROUND  Prevailing winds can displace migrating northern fur seal pups, who begin their epic journeys at just 4 months old, by hundreds of kilometers.

dwarf pines

BARREN TREES  Modern dwarf pines (shown) become unable to reproduce when irradiated by ultraviolet-B lamps. A similar fate may have befallen forests 252 million years ago, when massive bursts of volcanic gases likely weakened Earth’s ozone shield.

agricultural fields

FIELD FUMES California’s agricultural regions are responsible for between 20 and 51 percent of the total emissions of nitrogen oxide gases in the state, new research finds. Such “NOx” gases, which include nitric oxide and nitrogen dioxide, help produce toxic smog.

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