IS DEFORESTATION, THAT OCCURS IN MANY COUNTRIES, A CAUSE OR AN EFF...

18. Is deforestation, that occurs in many countries, a cause or an effect of overpopulation? a b c dLISTENING:A. Listen to the tape carefully and fill in each blank a suitable word. The population of the world has been (19) ……. faster and faster. World’s population (20) ……. about 500 million in 1650. It doubled in the period (21) ……. 1650 to 1850, the figure reached 2510 million. In