Solve the crossword puzzle.
ACROSS: 2.The process in which oxygen is released in atmosphere.
3. The strong winds blowing spirally.
5. Smoke mixed with fog. 6. Droplets of clouds falling on earth.
DOWN: 1.The gas which prevents the UV rays from reaching the earth. 7. The top layer of earth
4. A mixture of sand, clay and soil. 8. A greenhouse gas made of C and H