Ответ:
a) 1. Is that air and water pollution is reaching very large proportions
2. Are becoming seriously polluted by industry.
3. it is possible to eliminate air and water pollution by planned actions of human society as a whole.
4. is evident to all
5. to take measures to safeguard natural resources and the environment on a global scale.
6. are successfully being carried out on a global scale.
Объяснение: