If by "amount", you mean number, the answer is approximately 6 billion.
There are various attempts at accurate counts, but these are all flawed due to inaccurate counting in many countries. In many third world countries large numbers of people are uncounted, either due to corruption (China - only allowed one child, so pay the census inspector to ignore the others), and inefficiency (India, of course). In many countries people are in hiding (Europe, and much of Africa, and wherever there are refugees and illegal immigrants). And in parts of the developed world there is deliberate avoidance of the census, as a matter of "civil liberty".
Just under seven billion.
The are 6 kinds of great apes in the world today. The Gibbons, Gorillas, Orangutans, Chimpanzees, Bonobos, and humans are all members of the great ape family.
Cancer receptors
There are 47 third world countries today.
the world would have far less humans and everyone would be ill.
Depends on what you mean by early but before hospitals it was done at home just as it is in many parts of the world still today. The family helped.
There are 196 independent countries in the world today.
Over 75% of humans in the world are scared of dogs.
about 278,456,732,338 billion huskies live in the world today
natural gas is used by humans every day all around the world
humans
Alot.