As policies fails to meet standards set by scientists, the researchers and scientists are looking into climate engineering or geo-engineering as a back-up plan. Although geo-engineering is quite heard of, its utilization will be put into test if projects are to be implemented. Currently the problem with climate engineering, it is difficult to predict how the earth will react to the changes.
One thought has been researched in cooling the planet and that is using sulfate particles. This is quite common during volcanic eruptions, where sulphates are released into the atmosphere. Although there are side effects to this.