Перепишите предложения и переведите их на русский язык, обращая внимание на разные значения глаголов to be, to have, to do.
1.A program of measures aimed at purifying the water in this region is to be elaborated.
2.The environmental problems have acquired a global importance.
3.This factory doesn't erupt harmful gas and soot after a new powerful filter has been installed.
4.At present many industrial enterprises have their own purification installations to protect environment.