Air travel is booming as the world’s population grows and fares fall, but its impact on the Earth’s sensitive climate must be taken into account in any new global-warming pact,…

Nearly 200 nations agreed at United Nations-led talks in Bali on Saturday to launch negotiations on a new pact to fight global warming after a reversal by the United States…

A United Nations climate conference agreed on Friday a blueprint for fighting global warming and said governments have only a few years to avert some of the worst impacts.…