Overcrowding and slums developed in many impoverished countries in the 20th century, mostly due to large migrations to cities from people looking for work.
Climate change causes problems in our environment. The change in climate caused ice to melt and temperatures to rise. Because of the rising temperatures, habitats can be ruined and the animals that depend on that land and are living there can go extinct.
Answer:
Explanation:
It helps in assessing the level of pollution in relation to the air quality standards. Standards are a measure to set the target for pollution reduction and achieve clean air.
Answer:
Atmospheric pressure differs in different parts of the world.
Explanation:
- This is because atmospheric pressure depends on the height of a particular location on earth.
- A number of locations on the earth are at sea level. The atmospheric pressure at sea level is 14.7 pounds per square inch.
- At higher levels (altitudes) the atmospheric pressure is lower since higher places have got less air pushing downwards compared to lower altitudes which have more air pushing down and hence, high atmospheric pressure.
