Why is HIV-1 global whilst HIV-2 is remains largely confined to West Africa?
HIV-1 is by far the more virulent of the two species of HIV.
Because HIV-1 is more easily transmitted, it also spreads more readily and therefore accounts for the vast majority of global HIV infections.
HIV-2, because it is much less transmittable, is largely confined to West Africa (where it is thought to have originated) and to West African migrant communities in Europe.
HIV-1 also mutates more efficiently that HIV-2 and generally progesses to AIDS at a significantly faster rate than HIV-2 does.
While most climate scientists concur humans are predominantly responsible for current measured trends in global warming, there remains considerable debate in the political arena, largely among people ideologically opposed to the scientific claim humans have the capacity to significantly alter their environment. The scientific debate was largely settled about three decades ago. There is always the possibility someone might discover something entirely new and unexpected, but that grows smaller and smaller as time marches on.
Any piece of work which adopts the African style of writing (peculiar thematic preoccupation which is largely suppression, exploitation and misrepresentation), with its geographical setting traced to Africa, and discusses experiences of all the African countries as a peculiar distinct and to a larger extent unified and global!
The biggest economy in Africa is undoubtly the Republic of South Africa (South Africa) The South African GDP was $467.6 billion in the year 2007 and the global rank of South Africa was 27th. Egypt's GDP in 2007 was $431.9 billion and Egypt's global rank was 29. Egypt got the second biggest economy in Africa.
Global warming is causing global climate change. Extra greenhouse gases in the atmosphere of carbon dioxide and methane, largely, have caused an enhanced greenhouse effect. More greenhouse gases will hold more heat and this is causing global warming. The extra warming is going to change the climate.
Global winds are dependent largely on the large difference in temperature between polar and tropical regions. Global warming heats the poles faster than the tropics, thus reducing the temperature difference. Exactly how global winds would change as a result is hard to predict. One likely trend would be a weakening of jets streams in the temperate latitudes.
Global warming is long term changes - increases - in the global temperature. The increases in the global temperature are being caused by the accelerated greenhouse effect. That is, more greenhouse gases in the atmosphere (methane, but largely carbon dioxide from our burning of fossil fuels like coal, oil and gas) capture more of the sun's heat and warm the atmosphere. This extra warming is global warming.
Cecil Rhodes founded and owned De Beers which controlled around 90% of the global output of diamonds when he died in 1902. He controlled every major mine in South Africa other than the Premier Mine. He also had some interests in gold mines, however these were largely in the Transvaal and not in the Cape Colony (what is now South Africa). The mines in the Transvaal were owned by many different people including Barnato, Robinson…
There are many moral issues in global warming. Should developed countries, that are largely responsible for causing it, help developing countries, who played little part? Should we consider the children of the future, or should we think about ourselves? Is the economy of our country today more important that the threat to its economy if we allow global warming to continue unchecked?