<span>1. main sequence
2. red giant branch star
3. helium flash
4. horizontal branch star
5. asympiotic giant branch star
6. planetary nebula ejection
7. white dwarf</span>
Arctic ocean has a little biodiversity as compared to the other oceans. It is completely covered with ice in winters and partly covered in other seasons. Due to very low temperature, the natural life is very limited in the ocean. Moreover, global warming is further damaging its ecosystem.
Of the countries of North Africa, only Libya does not have a strong farming sector.
