What are two sources of carbon dioxide in the air?

Which two nations are doing the most to combat their environmental issues?

What gigantic island is primarily in the arctic circle?

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