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1·Of the first variety, injecting sunlight-reflecting sulphate aerosols into the upper atmosphere is a relatively cheap, easy and quick option.

对于第一种方式，在上层大气注入阳光反射硫盐酸气溶胶是一个相对便宜、简单、快捷的选择。

2·Any effect from modern changes in solar activity is likely to be dwarfed by greenhouse gas emissions and associated issues such as sulphate aerosols.

近现代时期，和温室气体及硫酸盐气溶胶相比，太阳活动的影响更是相形见绌。