本题目来源于试卷: Continuity and Change D.12 Climate Change，类别为 IB生物学
[问答题]
1.Compare the concentration and p:fc /t8kzpa* etfa+f2 o 3iy8zotency of carbon dioxide and methane as green1t ua 48 x5y5rioarb5zhouse gasbx o5au5z r 8i41yrat5es in the atmosphere.
2.Explain the reasoning of climate scientists for identifying human activity as the main cause of climate change.
3.Discuss the consequences of global warming with reference to the climate, marine organisms, and changes to coastal regions and Arctic ecosystems.
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