question_answer 45)

  An increase in carbon dioxide content in the atmosphere would not cause (a) more heat to be retained by the environment            (b) increase in photosynthesis in plants (c) global warming                                                                           (d) abundance of desert plants

Answer:

  (d) An increase in carbon dioxide content in the atmosphere would not cause abundance of desert plants as when the temperature rises (due to excessive carbon dioxide emission) their ability to take up carbon dioxide reduces.