নিচের অপশন গুলা দেখুন
- ১৯৮৭
- ১৯৮৫
- ১৯৯৩
- ১৯৮২
1 উত্তর
সঠিক উত্তর হচ্ছে: ১৯৮৫
ব্যাখ্যা: The most severe case of ozone depletion was first documented in 1985 in a paper by British Antarctic Survey (BAS) scientists Joseph C. Farman, Brian G. Gardiner, and Jonathan D. Shanklin. Beginning in the late 1970s, a large and rapid decrease in total ozone, often by more than 60 percent relative to the global average, has been observed in the springtime (September to November) over Antarctica. Source: britannica.com
ব্যাখ্যা: The most severe case of ozone depletion was first documented in 1985 in a paper by British Antarctic Survey (BAS) scientists Joseph C. Farman, Brian G. Gardiner, and Jonathan D. Shanklin. Beginning in the late 1970s, a large and rapid decrease in total ozone, often by more than 60 percent relative to the global average, has been observed in the springtime (September to November) over Antarctica. Source: britannica.com