Answer:
The air is clean and dry, not flooded with city lighting)
World War 2 occurred in the late 40's, so this is most likely why there is a dip in that age group.
Answer: Many factors (Cold climate drivers) Can influence earths climate such as changes in the suns intensity and volcanic eruption’s, as well as heat trapping gases in the atmosphere. The scientific evidence suggests that it is highly likely that humans are causing global warming
hope this helps you / have a nice day
Answer: it gives water
Drinking, cooking, electricity or hydroelectricity
We can use it to grow food or use it in hydroponics
We can filter it into drinking water
True it is the fourth or fifth largest river in america