Select all the correct answers. This graph gives information on greenhouse gas (GHG) emissions from generating electricity in the United States. Which questions would help clarify this evidence? Why does producing electricity cause greenhouse gas emissions? Why do power plants release hydrofluorocarbons and other F-gases? Why did greenhouse gas emissions decrease between 2007 and 2009? Are greenhouse gases released because of food digestion in cattle? Where is the data on greenhouse gas emissions from volcanic eruptions?.

80 points pls brainliest 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?