In the Ptolemaic model of the universe, . Earth was the center of the universe

the sun was the center of the solar system

Earth was flat

Earth was much larger than the sun

Which are practical examples of how people in the developed world could make a big difference in how much water they use check all that apply a. use lightbulbs that use less electricity b. consider using a composting toilet that does not use water c. avoid using your telephone during peak hours d. do not read books