Part 1 of Essay
It will be very comfortable for one person to stay in a single bed but it will be less and less if there is another person stay in that bed. It could be similar to the earth nowadays. What will happened if there are 10 people in a single bed? Everybody can think about the result of too many people in a small place. The wor ....

Part 2 of Essay
.... of reptiles, and 11 percent of birds are threatened with extinction. Another 5 to 14 percent of species in these groups are "nearing threatened status." "The leading cause of vertebrate declines is human destruction of old growth forests, wetlands, chaparral, and other rich habitats," Worldwatch reports. "Worldwide, over two-thirds of the earth's habitable land surface has been significantly disturbed by human activities. Nearly half of the world's 233 primate species are threatened, largely because of their depe ....