The air pollution makes the caribou unhealthy, and this makes them more vulnerable to predators and diseases.
Specifically, the food the caribou digest (for example lichens) absorb the pollution dispoportionally, which means that the caribou ingest many unhealthy particles.
Farming was very important and so were builders
Answer:
In 1 hour it will cover a distance of 15°
Explanation:
We know that for each rotation earth takes 24 hour
In 24 hour its travels 360° of rotation
We have to find how much we travel in 1 hour in degree
We know that 1 rotation = 360° which is completed in 24 hours
So distance traveled in 1 hour in degree will be = 
So in 1 hour it will cover a distance of 15°