The statistical study of all populations is called demography
Answer:
oxygen
Explanation:
because it comes after water
The most abundant in the atmosphere are Nitrogen, Oxygen, Argon, and Carbon Dioxide. All of these combined take up about 99.9% of the Earths atmosphere
Hope this helped!! :D
Answer:
1- D
2- A
Explanation:
1- Water and electricity is the best option to decrease carbon footprint.
2- not sure
