Can anyone guess which branch of the US government produced the following paragraph?“A well-documented rise in global temperatures has coincided with a significant increase in the concentration of carbon dioxide in the atmosphere. Respected scientists believe the two trends are related. For when carbon dioxide is released into the atmosphere, it acts like the ceiling of a greenhouse, trapping solar energy and retarding the escape of reflected heat. It is therefore a species-the most important species-of a ‘greenhouse gas.’”Glosses make this statement typical of arguments for urgent responses to global warming. The paragraph thus might seem to belong to some politic...