There are some greenhouse gases that are found naturally in the atmosphere such as carbon dioxide, methane, and water vapor. There are also greenhouse gases that are not found naturally; they are released from anthropogenic sources only. Chlorofluorocarbons (CFCs) are greenhouse gases that also contribute to ozone depletion. Although these chemicals have been banned, they will continue to remain in the atmosphere for many more years. Which anthropogenic sources contributed to CFCs being released into the atmosphere? A.)
CFCs are released naturally in Earth's processes.
B.)
CFCs were released from refrigerants, solvents, and aerosols.
C.)
CFCs were released from agriculture production and livestock.
D.)
CFCs were released from deforestation and burning fossil fuels.

20 point pls brianliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?