Does the US need to take an active role in stopping global warming?
Greenhouse gases are said to be the #1 cause of global warming. If so, then the US should take part in helping to curb these carbon emissions.
We do not have to be absolutely certain that global warming is the result of human activity, and we do not have to be absolutely certain that harm will result. But if both probabilities are high, then action must be taken even if the potential harm is only moderate, as this means that harm will probably occur unless action is taken. Even if both probabilities are quite low but the potential harm is very serious, then action must be taken by all nations involved, as this means that serious and possibly even catastrophic harm is possible unless action is taken. That is how risk management works.
The answers to the three questions posed in this risk analysis are as follows. The great majority of climate scientists, experts in this field, are almost certain that global warming is the result of human activity. They project serious economic and environmental harm to result from continuation of the present trend of rising average global temperatures. Since this involves an issue of economics, not merely ecological issues such as the survival of species, economists are required to provide input into the answer on the seriousness of the potential outcome. Based on information and analysis by climate scientists, they anticipate serious economic disruption, which will include relocation of entire populations.
Based on the best available advice, the earth faces a crisis and it is too late to wait in hope until the damage bills start coming in. As the second-highest emitter of greenhouse gases, the United States has a responsibility, not only to itself but also to all other nations, to take an active role in stopping global warming.