Results #1. What is the primary cause of the global warming trend observed since the mid-20th century? a) Human activities enhancing the ozone layer a) Human activities enhancing the ozone layer b) Increase in volcanic activities b) Increase in volcanic activities c) Expansion of the greenhouse effect due to human activities c) Expansion of the greenhouse effect due to human activities d) Changes in natural atmospheric conditions d) Changes in natural atmospheric conditions #2. Which gas is considered the most important long-lived "forcing" of climate change? a) Methane a) Methane b) Nitrous oxide b) Nitrous oxide c) Carbon dioxide (CO2) c) Carbon dioxide (CO2) d) Chlorofluorocarbons (CFCs) d) Chlorofluorocarbons (CFCs) #3. Which gas, on a molecule-for-molecule basis, is more active as a greenhouse gas than carbon dioxide? a) Methane a) Methane b) Nitrous oxide b) Nitrous oxide c) Chlorofluorocarbons (CFCs) c) Chlorofluorocarbons (CFCs) d) Ozone d) Ozone #4. What is the primary source of carbon dioxide released into the atmosphere? a) Volcano eruptions a) Volcano eruptions b) Deforestation and land use changes b) Deforestation and land use changes c) Commercial fertilizer use c) Commercial fertilizer use d) Ozone layer destruction d) Ozone layer destruction #5. Which greenhouse gas is both produced by soil cultivation practices and fossil fuel combustion? a) Methane a) Methane b) Nitrous oxide b) Nitrous oxide c) Chlorofluorocarbons (CFCs) c) Chlorofluorocarbons (CFCs) d) Ozone d) Ozone Next Post navigation Environmental Legislations Environmental concepts
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