Conservation is the one method of improving air quality among the following choices given in the question that does not require advanced technology. The correct option among all the options that are given in the question is the second option or option "b". This method only needs preserving the natural balance.<span />
Answer:
A. The mass extinction of dinosaurs occurred at the Cretaceous/Paleogene boundary.
Explanation:
The most known extinction is the associated with the Dinosaurs, which happened at the Cretaceous/Palogene boundary (66 million years ago), although there is still a huge discussion on the causes of such extinction (comet/asteroid, changes in sea level, volcano activity).
Such event meant the dissappearing of two-thirds of the living species on Earth.
Answer:
Yes, but only if it shows signs of actually being dangerous
Explanation:
The answer is A.
This is because cities contain more people in one area, thus they contain more businesses like restaurants, cafes, etc. that produce more overall exhaust than say a more rural town with fewer people. Light pollution will also be largely greater over a city as opposed to a rural town.
Its to the west because if you think about it, it makes sense. You have to start backward.
