Saim Kashif

Air Pollutants The release into the air of chemicals and particles can cause direct damage to the troposphere (air pollution); alter the composition and function of atmospheric layers (greenhouse effect) or other indirect damages (ozone layer depletion).  An air pollutant is a substance in the air that can cause harm to humans and the environment. Pollutants can be classified as primary or secondary. Usually, primary pollutants are directly emitted from a process, such as ash from a volcanic eruption, the carbon monoxide (CO) gas from a motor vehicle exhaust or sulfur dioxide (SO2) released from factories. Secondary pollutants are not emitted directly. One example is ground-level ozone. The transport sector has become one of the main emitters of polluting compounds in the world and one of the main causes of the greenhouse effect. Through the burning of fuel, motor vehicles, cars and trucks emit a range of health damaging pollutants, such as particulate matter, nitrogen oxide...

WORLD POPULATION SIGNIIFICANT FIGURES # Region Population (2020) Significant Figures Round off to 3 s.f. 1 Asia 4,641,054,775 10 4,640,000,000 2 Africa 1,340,598,147 10 1,340,000,000 3 Europe 747,636,026 9 748,000,000 4 Latin America and the Caribbean 653,962,331 9 654,000,000 5 Northern America 368,869,647 9 369,000,000 6 Oceania 42,677,813 8 42,700,000  

Overpopulation Overpopulation is an undesirable condition where the number of the existing human population exceeds the actual carrying capacity of Earth. Overpopulation is caused by a number of factors. Reduced mortality rate, better medical facilities, depletion of precious resources are few of the causes which result in overpopulation. It is possible for a sparsely populated area to become densely populated if it is not able to sustain life. Growing advances in technology with each coming year has affected humanity in many ways. One of these has been the ability to save lives and create a better medical treatment for all. A direct result of this has been the increased lifespan and the growth of the population. In the past fifty years or so, the growth of the population has boomed and has turned into overpopulation. In the history of our species, the birth and death rates have always been able to balance each other and maintain a population growth rate that is sustainable. Since the ...

WORLD POPULATION BY REGION # Region Population (2020) Yearly Change 1 Asia 4,641,054,775 0.86 % 2 Africa 1,340,598,147 2.49 % 3 Europe 747,636,026 0.06 % 4 Latin America and the Caribbean 653,962,331 0.9 % 5 Northern America 368,869,647 0.62 % 6 Oceania 42,677,813 1.31 %   TOP 20 LARGEST COUNTRIES BY POPULATION 1     China 1 , 442 , 984 , 844 2     India 1 , 389 , 027 , 917 3     U.S.A. 332 , 285 , 308 4     Indonesia 275 , 449 , 555 5     Pakistan 223 , 789 , 767 6     Brazil 213 , 559 , 911 7     Nigeria 209 , 621 , 743 8     Bangladesh 165 , 780 , 846 9     Russia 145 , 975 , 453 10 ...

PAKISTAN INSIGHTS The current population of  Pakistan  is  223,666,987  as of Thursday, February 25, 2021, based on Worldometer elaboration of the latest United Nations data. Pakistan  2020 population is estimated at  220,892,340  people at mid year according to UN data. Pakistan  population is equivalent to  2.83%  of the total world population. Pakistan  ranks number  5  in the list of  countries by population. The population density in Pakistan is 287 per Km 2  (742 people per mi 2 ). The total  land  area is 770,880 Km2 (297,638 sq. miles) 35.1 %  of the population is  urban  (77,437,729 people in 2020) The  median age  in Pakistan is  22.8 years . Population of Pakistan (2020 and historical) Year Population Yearly % Change Yearly Change Migrants (net) Median Age Fertility Rate Density (P/Km²) Urban Pop % Urban Population Country's Share of World Pop World Population Pa...