How many people in our earth?

How many people in our earth? How many people in Canada? Many people said our earth is completely polluted.Things are HOW MANY PEOPLE DIED IN THE ACCIDENT how many people died in iraq? how many people play majiang in china How many people are there in Shenzhen? how many people in the Linda's How many people spoke in the story? How many people in you family? How many children in our school?还是how many children our scho 1.how many people in quebec? 2.how many people live?3.what i