(Infrared Radiation)
. . .
(Ultraviolet Radiation UV)
. (A, B, C) . (UVC) (UVB) (UVA) . (UVA) ֡ . ( ). (UVC) .
(Dioxins)
. ȡ ( PVC) . .
(Over Grazing)
() . ѡ ).
(Aerosols)
. ɡ ɡ . ݡ ( CFCs
(Drought)
ɡ . . ɡ . . .
" ɡ . ɡ ɡ ǡ .
"" ɡ ɡ .
.
ʡ 15 ѡ .
ɡ ǡ Global Warming "" " ".
0.4 0.8 150 ɡ .
ɡ ʡ .
10 20 ݡ ɡ ɡ .