Answer:
Michael J fox
Justin Bieber and many others
Answer:
Explanation:
Acid rain is a kind of rain or precipitation that contains high concentration of harmful acidic pollutants mainly nitrogen oxide and the sulfur dioxide which is released into the atmosphere that reach the earth's surface. It is caused by burning of fossil fuels and other industrial wastes released into the atmosphere that reach with rain and turns the precipitation acidic . The marbles of Taj Mahal is also getting adversely affected due to acid rain.
Acid rain is associated with the Part of USA and Canada for two reasons -natural causes such as volcanic eruption,wildfires and lightning:man made causes such as coal plants and Air pollution from automobiles . An average pH of 4-5.is usually found there (5.6 is normal for atmosphere) .
Population change
Explanation:
The change in the number of people living in a city, county, state, province or nation is generally referred to as population change.
Population change is positive when there is an increase in population;
Population change is negative when there is a decrease in population.
- Population is dynamic and it changes over a length of time.
- Migration is one of the leading cause of population changes.
- When people move away from an area, it is called emigration. It is a negative population change
- When people moves to an area, it is positive population change called immigration.
- Other cause of population changes are war, vices, economy, employment opportunities, education etc.
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I think that: "all of the above"
