Harmattan haze

Advises on airport closure, flight delays over inclement weather   The Nigeria Civil Aviation Authority (NCAA) has advised pilots and airline operators to exercise caution over hazardous weather in the dry season. This warning was contained in a release by the Nigerian Meteorological Agency (NiMET) on weather alerting the public on the possibility of deterioration in visibility as a result of observed dust haze propagated into the country from the source region. The Director-General of…