Tropical rain forest cover has reduced from ________ to ________ over the years due to 'evil quartet'.

Step-by-step solution

According to the NCERT Biology textbook, habitat loss and fragmentation is the most important cause driving animals and plants to extinction, which is a major component of the 'evil quartet'. The most dramatic examples of habitat loss come from tropical rain forests. Once covering more than 14 % of the earth's land surface, these rain forests now cover no more than 6 % . Therefore, the tropical rain forest cover has reduced from 14 % to 6 % . Answer: 14 % , 6 %