1. Increased frequency of hurricanes
  2. Loss of fertile delta region as for agriculture
  3. Decreased rate of photosynthesis in vegetation
  4. Shrinking of the polar ice regions
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1 Answers

Answer: Option 3

Decreased rate of photosynthesis in vegetation is least likely to be an effect of global warming. Carbon dioxide warms the Earth because it is a greenhouse gas in the atmosphere, but it also causes plants to provide less evaporative cooling.

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