By Robin MILLARD GENEVA, Oct 19, 2023 (AFP) – The amount of dust in the world’s air worsened in 2022, the United Nations said on Thursday, as it called for more research into how climate change may increase sandstorm hotspots. The UN’s World Meteorological Organization (WMO) said the slight rise was due to increased emissions from west-central Africa, the Arabian Peninsula, the Iranian Plateau and northwestern China. “Human activities are having an impact on sand […]