In their excellent Perspectives article in this issue (1), Ramanathan and Feng (R&F) sound a harsh wake-up call for those concerned about anthropogenic climate change: the authors maintain that the greenhouse gas (GHG) emissions of the past have already loaded the Earth System sufficiently to bring about disastrous global warming. In other words, the ultimate goal of climate protection policy, as stipulated by the United Nations Framework Convention on Climate Change (UNFCCC) (2), appears to be a delusion. So should we stop worrying and rather start panicking now?
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