The first hole in ozone layer was detected in ?
A1980
B1985
C1990
DNone of the above
No.1 PSC Learning App
★
★
★
★
★
Related Questions:
Why is CNG (Compressed Natural Gas) preferred over petrol?
Which sewage contains biodegradable waste such as organic matter?
Which among the following is the dangerous Green House Gas, created by the Waste Water?
UV കിരണങ്ങളിൽ ഏറ്റവും അപകടകാരിയും ഓസോൺപാളി പൂർണ്ണമായും ആഗിരണം ചെയ്യുന്നതുമായ UV കിരണം ഏത്?
By the emission of _______ acid rain is caused.