The city council is debating global warming but members are unsure of the scientific facts. The council selects you to research and report on the scientific facts of global warming and explain the carbon cycle and how it relates to global warming. Your report must compare and contrast photosynthesis and cellular respiration, discuss how CO2 levels have changed over 650,000 years and since the industrial revolution, explain how scientists measure CO2 levels, identify two primary factors in changes to CO2 levels since the industrial revolution, and describe two implications of climate change for biological systems.