By the year 2050, nearly 80% of the Earth’s population will live in urban centers. Applying the most conservative estimates to current demographic人口统计学的 trends, the man population will increase by about three billion people by then. An estimated 10 hectares of new land (about 20% larger than Brazil) will be needed to grow enough food to feed them, if traditional farming methods continue as they are practiced today. At present, throughout the world, over 80% of the land that is suitable for raising crops is in use. historically, some 15% of that has been laid wasted by poor management practices. what can be done to ensure enough food for the world’s population to live on?
by the year 2050
increase by about 3 billion
about 20% larger than
live in urban centers
apply sth to sth
the most conservative estimates 保守估计
traditional farming methods传统耕种方法
be suitable for
be in use 使用中
the Earth’s population/ the man population/ the world’s population
if traditional farming methods continue as they are practiced today
if traditional mining methods continue as they are practiced today, at least 5,000 people will be killed according to a conservative estimate.
n. 估计、估价 a rough estimate粗略估计
v. 估价、估算 the satellite will cost an estimated 400 million pounds.这颗卫星估计要耗资四亿英镑。