What kind of question is that? Do you seriously expect me to give an "exact" solution? Furthermore how many complicated issues have solutions that have no potential to cause harm and are guaranteed to help. I think it is pretty clear at this point that there is no magic solution to climate change and we have to make some collective sacrifices. Individually I did make a "sacrifice" by going vegan. After 3 years I haven't noticed any harm and I'm confident it has helped about epsilon amount. I guess that fits your criteria.

And my question again is simply what do you propose we should do collectively that's not going to be just as big a threat itself?