Fix grammaticality of the sentence: If research and development were ceased to exist, it would be much tougher to take care of the elderly as the world's aging population is expected to increase from now till 2050.
If the world's population is expected to increase from 7 billion to 9 billion by 2050, the world's population of people aged 65 and older will be 1.4 billion, and the world's population of people aged 65 and older will be 1.9 billion.
The world's population is expected to increase from 7 billion to 9 billion by 2050, and the world's population of people aged 65
The elderly are the most vulnerable population in the world.
The elderly are the most vulnerable population in the world.
The elderly are the most vulnerable population in the world.
The elderly are the most vulnerable population in the world.
The elderly are the most vulnerable population in the world.
The elderly are the most vulnerable population in the world.
The elderly are the most vulnerable population in the world.
The elderly are the most vulnerable population in the world.
The elderly are the