Answer:
Briefly ask question please
Erosion,oil spills,pollution,tourism,urban development
. Be international
. Consider multiple viewpoints
. Deal with multiple uses for resources
E0 ellipticals are nearly circular, while E7s are very stretched out. Elliptical galaxies are made up of mostly old stars, and do not have much gas and dust. There is very little new star formation in these galaxies.
Mostly made of old stars