When it comes to low-carbon economy, it's advantages far outweigh its disadvantages. 说到低碳经济，其利远远大于弊。"本句是典型的议论文的开头。when it comes to...后面必须接名词或者动名词，表示“当提及／谈论……时”。如：recycling（回收利用）、banning fireworks（禁止燃放烟花爆竹）、market economy（市场经济）、human right（人权）、trade protection（贸易保护）等。动词outweigh意思是“比……重；比……（在重要性上／影响上）重要；胜过……”。如：The advantages of the plan outweigh its drawbacks.那个计划的优点胜过缺点。句型拓展1. When it comes to fish oil, more is not better.
说到鱼油，并不是吃得越多越好。
2. With respect to the subject of money, most people would rather play it safe.当问题涉及金钱时，大多数人都会谨慎行事。