Green house gases are called such because they December 20, 2022 by admin (a) Are produced in green house (b) Prevent the escape of heat, waves reradiated from the earth’s surface (c) Are used in warming plant growth chambers (d) Help in maintaining atomspheric O 2 and CO 2 balance.
Radiat ions fr om out er space ar e not healt h hazardous as December 20, 2022 by admin (a) They are harmless (b) Only 0.1% of them reach the earth (c) These are useful (d) They provide energy
Man made radioactive element Sr 90 accumulates in the body through December 20, 2022 by admin (a) Breathing (b) Drinking water (c) Food chain (d) Contaminated soil.