Which statement explains why many scientists believe that carbon dioxide has likely contributed more to global warming than other greenhouse gases? a. carbon dioxide is emitted from fertilizers used in farming. b. other greenhouse gases trap more heat than carbon dioxide. c. carbon dioxide has increased as a result of increased human activities. d. carbon dioxide is emitted from commercial refrigeration.

C is your answer. Commercial refrigeration and farming are human activities. B makes CO2 seem not as bad so it doesn't fit the question.

Wetlands form where water and land meet. a lake with a wetland fringe can fill in with decayed plant and animal material to become a wet meadow. a pond can fill in to become a bog or fen. sediment can fill in a river marsh to become a swamp.flooding of coastal lowlands from rising sea levels has created broad coastal marshes that are protected from wave action by barrier islands or reefs. coastal wetlands also form when rivers deposit sediment as they reach the ocean. plants then take root and hold the soil firm against the forces of tides and waves.

The correct answer is c