A. ozone accumulation
B. ozone depletion
C. acid rain
- Shoe was thrown at Nawaz Sharif on March 11, 2018 at ______________?
- The study of cancer is called_____________?
- The outermost layer of skin is called__________?
- The first artificial satellite on earth is ______________?
- Guidance removes:______________?
- The presidency of Abraham Lincoln began on ______________, when he was inaugurated as the 16th President of the United States?
- Antheridia and archegonia are born on ______________ in bryophytes.
- Fog in the forms of warm rain falls into a cold layer of surface air is called ______________?
- The sun is made up of 99.9% of ________________ and ______________?
- Which of the following metal occurs in free state ______________?
- The Graetz bridge makes excellent use of ______________?
- PSR J0108-1431 is the closest known ______________ to Earth?