Learn Italian: L'inquinamento globale diminuirà presto. - Global pollution will decrease soon.

Diminuirà comes from the regular -ire verb diminuire (to decrease). To form the future tense for lui/lei/Lei (he/she/it/you formal), you drop the final -e of the infinitive and add the ending -à. So, diminuire becomes diminuir- + -à = diminuirà. Remember that the written accent on the final à is mandatory!

Is inquinamento related to a verb we can use?

Yes! It comes from the verb inquinare (to pollute). In Italian, adding the suffix -mento to a verb stem often turns it into a masculine noun describing the action or result, very similar to "-ment" or "-tion" in English. So, inquinare becomes inquinamento (pollution).

Why does globale end in -e if inquinamento is a masculine noun ending in -o?

Globale belongs to a group of adjectives that end in -e in the singular. These adjectives use the exact same form for both masculine and feminine nouns. Because it doesn't change for gender, it stays globale here to match the singular masculine noun inquinamento. If it were plural, it would change to globali.

Doesn't presto usually mean "early"?