Learn Italian: Pulirete l'ambiente tra un mese? - Will you all clean the environment in a month?

Pulirete is the future tense for voi (you all). For regular -ire verbs like pulire, you simply drop the final -e from the infinitive and add the voi future ending, which is -ete. So, pulir- plus -ete becomes pulirete.

I remember pulire uses the -isc- pattern in the present tense. Does that happen in the future tense too?

Great memory, but no! The -isc- pattern (like io pulisco or lui pulisce) only applies to the present tense. In the future tense, all regular -ire verbs act exactly the same, whether they are -isc- verbs or not. You just use the base verb pulire, drop the final -e, and add the regular future endings.

Why is the English phrase 'in a month' translated using tra instead of in?

When talking about an amount of time from right now (like 'in a month' or 'in five minutes'), Italian uses the prepositions tra or fra. If you used in un mese, it would mean it takes a month of continuous effort to finish the cleaning, rather than the cleaning happening a month from now.

Is ambiente masculine or feminine, and why does it use ?