The world population has doubled in the last 60 years and is expected to grow to 9700 million people in 2050 and to 11,200 million by the end of the 21st century, which will have a strong impact on population structure, ...

The world’s population continues to grow at a high rate, such that today’s population is twice that of 1960, and is projected to increase further to 9 billion by 2050. This situation has brought about a situation in which ...