CO₂ (parts per million) 380 340 300 260 220 180 400 Figure 2 - Historical Carbon Dioxide Levels HIGHEST HISTORICAL CO, LEVEL 350 CURRENT 1950 300 250 200 150 100 Thousands of Years before today (0 = 1950) 50 →➜ 0 Which of the following newspaper headlines is the most accurate for an article being written about the data in Figure 2? O Carbon Dioxide Concentrations Well Above Levels from the Last 400,000 Years O Carbon Dioxide Concentrations at Historic Lows Biggest Improvement in Decreasing Carbon Dioxide Levels Since 1900 O O Carbon Dioxide Concentrations Reach Their Peak 325,000 Years Ago

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