We currently reviewing the nature science journals and plan to add around 20 new journals in 2017.Pall Thordarson commented
Actually it would make much more sense to add Energy & Environmental Science (EES) than Environment Science & Technology. The former has IF > 20 while the latter is around 5. And n.b. the philosophy here with the Nature Index seems to be roughly one journal per specialised area (e.g. there is only one inorg chem, one org chem, one phys chem etc.. on the list) which is fine by me. My vote therefore goes for EES - it is certainly the most respected Environmental Science journal out there to those of us outside the immediate field!