PLS HELP ME! BRAINLIST AND 25 POINTS! 1. Discuss the different types of pollution, including the causes and possible solutions. 2. How did the Industrial Revolution impact society? 3. Discuss alternative energy sources, including the advantages and disadvantages. 4. Discuss the ways hazardous wastes are treated. 5. Name some ways you can use the "3 R's" in your home.

Select the correct answer. what was edwin hubble's contribution to the field of astronomy? a. he discovered variable stars. b. he proved that the heliocentric model accurately described our solar system. c. he found a relationship between the period luminosity and distance of stars. d. he proved that the universe is finite. e. he discovered that the universe was expanding.