Because there are only about 33 million people living in a huge area of 13,100,000 km2. It is very cold in Siberia and the conditions are not good for people's lives, and therefore the population density is only 2,5 inhabitants per square kilometer.
Answer:
3.) Pumice
Explanation:
"Pumice is widely used as an abrasive in soaps and cleaners. It is considered one of the softest abrasives on earth."
The similarity is that in every weather there is a season.
<span>So far, astronomers have found more than 500 solar systemsand are discovering new ones every year. Given how many they have found in our own neighborhood of the Milky Way galaxy, scientists estimate that there may be tens of billions of solar systems in our galaxy, perhaps even as many as 100 billion.</span>
