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Start learning 50% faster. Sign in nowOzone depletion refers to the phenomenon of reductions in the amount of ozone in the stratosphere. The problem of ozone depletion is caused by high levels of chlorine and bromine compounds in the stratosphere. The origins of these compounds are chlorofluorocarbons (CFC), used as cooling substances in air conditioners and refrigerators, or as aerosol propellants, and Bromo fluorocarbons (halons), used in fire extinguishers. As a result of depletion of the ozone layer, more ultraviolet (UV) radiation comes to Earth and causes damage to living organisms. UV radiation seems responsible for skin cancer in humans; it also lowers production of phytoplankton and thus affects other aquatic organisms. It can also influence the growth of terrestrial plants.
In a family, A’s father is the brother and only sibling of B and son of C. K is the wife of the brother of A’s father. D is the son of B and E is th...
What comes next in the series in place of ?-
X, T, P, L, ?
From his fishpond, Niyaz went to the fish market. First, he went straight towards the north for 2 km and then turned right. Thereafter, he walked straig...
Figure A is related to figure B in a certain pattern. Following the same pattern, figure C is related to figure D. Study the pattern and select the figu...
Which of the four options will replace the question mark (?) in the following series?
XF 11 , YI 15, ZL 19 , AO 23, ?
Select the number from among the given options that can replace the question mark (?) in the following series.
4, 13, 40, ?, 364, 1093
Which of the following numbers will replace the question mark (?) in the given series?
3, 12, ?, 39, 57, 78
Soham says, "I have as many sisters as brothers." Pooja says, "Each of us sisters has only half as many sisters as brothers." Assuming that Soham and P...
Select the Venn diagram that best illustrates the relationship among the following classes.
Females, Relatives, Uncles
In a certain code, the word COMPAQ is written as DQNRBS and SONY is written as TQOA. In the same code, how is MOTOROLA written?
