Fill in the Blanks1. Those waste materials which can be broken down to non-poisonous susbtances in nature in due course of time by the action of micro-organisms are called …….. wastes.2. The waste materials which can not be broken down into harmless substances in nature are called …….. .3. …….. is the ultimate source of energy.4. In 1987 …….. succeeded in forging an agreement to freeze CFC production at 1986 levels.5. Ozone at the higher levels of atmosphere is a product of UV radiation acting on …….. molecule.6. …….. can be classified as herbivores, carnivores, omnivores and parasites.

Harshit Singh , 3 Years ago

Grade 12th pass