PROTECTION AGAINST DUST AND ALLERGENS IN SAUDI ARABIA OPTIONS

Each the onset and the end of the African Humid Time period (i.e. the ‘climatic optimum’ that ended approximately 5500 YBP) seem to have already been abrupt, Despite the fact that its astronomical causes endure an incredibly gradual transform (deMenocal et al. 2000). Unraveling the triggers of this sort of an abrupt local climate shift can be a