It is great that you have worked on such projects at such an early age and I wish you all the best for your physics degree.
You want to know whether there's value in your projects.
First, you need to consider what you want, perhaps in terms of commercialisation, impact, or ... That is, you need to establish what "value" means to you. Then you can establish (perhaps with our help) whether you should start "a 5 year study on Air quality & climate change using 10 arduino sensors (gas , dust , temp & humidity) and an arduino."
Secondly, you need to establish how you can achieve what you want. You've mentioned that you'll have breaks during your physics degree. (That detail has been edited out, see the archived version.) But, those breaks are short and you'll need longer to conduct your five-year study.
I think these points need further thought before you can decide whether results can be published and whether it is worth your time.
Can I publish such research anywhere?
I think it is better to consider whether you should publish, rather than whether you can publish. This has been dealt with elsewhere (it was written for mathematics, but it applies to physics too):
I would advise almost any junior high school student not to think about publishing their mathematical work. Note that I did not say to stop or slow down in the learning and doing of mathematics in any way. In fact, the point is that the publication process is something that is done by professionals largely for reasons of professional exigency and not because it is pleasant or educational in its own right. When I work with PhD students to try to get their first paper published, there comes a point where they realize that the amount of effort to do so (even after all the theorems are proven) is something like 2-10 times as much as they expected...Moreover, undergraduates who do summer math research are now being much more pressured to write up their results -- even when they are not really significant, and even when they were largely put up to the results by their faculty mentors -- and this is very worrisome.
The OP is significantly older, but I think the point holds.