In truth, sea-level rise and greater frequency of storms are higher-order results of global warming, in that they would require several links in a causal chain to be proved.

• 事实上，海平面上升与风暴频率增高，是较高层次的全球暖化效应，想要证明这些现象与全球暖化间的因果关系，必须先建立数种关联。