When the fortunate among us feel very sick, we visit a doctor. If we are lucky, they will decide that the ailment is curable and issue us with a prescription. For some tablets, perhaps. Or something simpler, like rest. More often than not the problem goes away.
Our planet is sick, according to the scientists of the IPCC, the Intergovernmental Panel on Climate Change. Their prescription to humanity is clear: we must arrest the rising temperature of Earth's surface, by reducing the concentrations of greenhouse gases in our atmosphere. The symptoms won't clear up unless we act, and even then there will likely be lasting effects.