The fast dwindling $....A... $$\;\%$ forest is estimated to produce $....B... $$\;\%$ percent of the total oxygen in earth’s atmosphere.

  • A

    $A -$ Siberian, $B -30$

  • B

    $A -$ Temperate, $B -20$

  • C

    $A -$ Alpine, $B -15$

  • D

    $A -$ Amazon, $B -20$

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