Multiple choice

What immediate hazard is likely to occur if the temperature of the earth rises by 5°C?

  1. Melting of polar ice

  2. Destruction of phytoplankton

  3. Inundation of coastal towns

  4. Increase in productivity
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A Correct answer
Explanation

A 5°C temperature rise would most immediately cause polar ice caps and glaciers to melt. While inundation of coastal towns would eventually occur, it's a secondary effect that happens after the ice melts and sea levels rise. Phytoplankton destruction and productivity changes are also longer-term ecosystem effects.

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