I read it while you were drying your hair.
While I was in Italy I went to see Alessandro.
Are there any contrasts between the two actions in these two sentences?
Moreover, if you are ready to give feedback in English, make sure that you will make the time to proofread your feedback for grammatical errors or you have a relatively strong command of English grammar.
You haven't mentioned which particular countries, just "industrial countries" is okay.
This sentence is incomplete since "which", in this case, is used to introduce a relative clause. You might want to say "You haven't mentioned which particular countries are industrial,..." Another solution is to change 'which" into "any".
The determiner the in "the nature" is misuse, only "nature" is okay, or you can either say "the environment".
"Either" in this sentence should be "also" and they are not the same. We use "either" instead of "also" only in negative sentences. For example, I don't eat meat and my husband doesn't either.
The phrase "It is the case that" should be eliminated as there's no need to emphasize.
"emphasize" is a transitive verb and thus needs an object following. Therefore, it should be "there's no need to emphasize it".
Last,
"While I hold the belief a desperate shortage of public responsibility for saving the nature springs from numerous underlying causes, I also suppose several effective solutions should be taken into account."
From my perspective, I would not try to rewrite this sentence since it can make sense with a little correction as follows:
"While I hold the belief that the desperate shortage of public responsibility for saving nature springs from numerous underlying causes, I also suppose that several effective solutions should be taken into account."
I said "the desperate shortage" because the part "of public responsibility for saving nature" already made the noun known to me. However, I also agree that "I believe that" is a better way to express the meaning and the sentence should be splitted into two sentences to avoid wordiness.
Anyway, thank you for your construction.