summary of "Research on global sun block needed now"

In this passage, the authors introduce a new idea called Solar-radiation management (SRM) to combat climate changes. The authors state that SRM is recommended because this method is cheap and efficient. SRM is at least 100 times cheaper than carbon emission cuts, and also it can solve the climate change problems within months. However, although it seems that SRM is the cheapest and fastest way to combat climate changes, the authors talk about some opposite points that rebut using SRM. First, SRM may cause some other environmental problems such as less precipitation and less evaporation. Second, the dearth of data is a problem. There are no field tests except the recent small Russian test. Third, international governance problems should be solved. The main problem of governance problems is establishing legal collective control over an activity that some may do by themselves. At present, the main argument against SRM according to the authors is SRM will reduce the will of emission cuts. The authors think SRM can be researched on. If SRM is unworkable, the sooner we know, the less harm it poses; if it is workable, we have a useful tool to combat climate change.
Liu Yufeng