According to Environmental (Protection) Act of 1986 "environmental pollutant" means
1
any solid, liquid or gaseous substance present in such concentration as may be, or tend to be, injurious to environment;
2
any substance present in such concentration as may be, or tend to be, injurious to environment
3
any solid, liquid or gaseous substance present in such concentration as may be, or tend to be, injurious to a person
4
any solid, liquid or gaseous substance present in such concentration as may be, or tend to be, injurious to the society