At least 7 billion people
The lower levels of the pyramid must also grow-for more people to consumer higher-end items, there must be more people to make those items.
Overcrowding and slums developed in many impoverished countries in the 20th century, mostly due to large migrations to cities from people looking for work.
Answer:
Negative
Explanation:
Aerosol -
It is the suspension of the solid or liquid particles in the air , is known as the aerosol .
The effect of aerosol is , that it reduces the amount of the solar radiations incident on the surface of the Earth , and due to this capacity to reflect the solar radiations , it has a negative impact on the Earth .
As we known solar energy are of huge importance for the human beings .
Hence , the answer is negative .
