Answer the following question: Fact 1: Carbon dioxide concentrations in the air have increased over the last decade dramatically. Fact 2: Decades have 10 years. Given the two facts above, answer the question "Concentrations of what in the air have increased over the last 10 years dramatically" with the following options: - chlorofluorocarbons - fossil fuels - ozone - Greenhouse gases - Greenhouse gasses - oxygen - carbon dioxide - air molecules
Answer:
carbon dioxide