Last time I checked commerce buildings add very little pollution. Also if ya had the right person to ask from ya should have a good general setup of commerce cus that should be the first thing u should work on as a young nation. If you have a low economic output now than that is your problem not others unless you got fooled. Another reason ya would want more $$$ is if ya had ITC which is another project. With most nations around I'd say half a year should be around 10c, 1500 score, & 2000 infra/land ya should be able to have 1 supermarket, 5 banks, 4 malls, 3 stadiums, 1 nuclear pp, 5 barracks, 3 Factories, 5 hangars, 1 Drydock, 1 Pstation, 1 Hospital, & 3 RCenters each city. Then dedicate each city to farming one rss(does not have to be multiple rss made in whole nation but it would be more efficient) besides $$$. Now add in the work & expense to getting that Pollution Project & you could take out only one project in only one city if you mean overall. If it is in each city then that is only one slot per city then(The latter would make more sense). At this state you would have to either add another raw rss, manufacturing, or if you do have below 100% commerce another $$$ building(which should be unlikely if you followed your alliance plans, ally plans, or friends plans, like the one I stated above). To be honest tthou this project would help more w/ rss farming than $$$ making.