The world’s population is concentrated in certain countries like china most likely because of there being endemic diseases in the country. the lack of availability or lack of use of contraceptives. the emigration of people from more populated countries. the country’s land mass, which is much larger.

Why is the huronian supergroup rock formation particularly interesting to scientists? because it looks like a cross-section of a giant, stone encyclopedia because it formed during the period when oxygen began to accumulate in the atmosphere because it contains unusually large amounts of oxygen and sulfur because it dramatically altered the planet's development when it first formed