A substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource is called:

1.  Pathogen 2.  Allergen
3.  Pollutant 4.  Secondary metabolite
Subtopic:  Introduction to Pollution & Types |
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The Environment [protection] Act to protect and improve the quality of our environment [Air, Water and Soil] was passed by the Government of India in:

1. 1974 2. 1981
3. 1986 4.  1988
Subtopic:  Introduction to Pollution & Types |
 68%
From NCERT

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