Answer:
Elliptical galaxies are one of the three types of galaxies. They have a rounded shape of an ellipse, like a stretched-out circle. They lack the swirling arms that are a main feature of spiral galaxies.
The number of neutrons is obtain through the difference of the mass number and the number of electrons.
The answer to you question is 3
1)<span>is an international treaty which extends the 1992 United Nations Framework Convention on Climate Change
2)you have to get checked for greenhouse gases.,car checks(Smog)
3)i think that is is a good thing.</span>