Carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase, because of an increase in agriculture and because more land will have to be cleared for increasing populations and agricultural use.
Only about 3 percent of the worlds water is fresh, and even less than that is usable, because most of it is locked up in glaciers or in permanent snow fields.
The correct answer is D.
Answer:
Thermosphere.
Explanation:
The Northern lights are located at the Thermosphere of the atmosphere. The Thermosphere is lies beyond 80 km above the mesopause. The properties of gases are not constant in this layer. temperature increase rapidly with the increase of height. There are number of ionic layers in this sphere. The layer called D disappears with the sunset as it associated with solar radiation.
