Agence France-Presse: Fog, mist and haze in Europe have declined over the last three decades, a trend that may have stoked regional warming and ironically could be linked to better air quality, a study published on Sunday says. From 1978-2006, temperatures in parts of Europe rose above the global land average, with prominent increases in the north, centre and eastern parts of the continent. As much as 20 percent of Europe’s warming during this time, according to the study, can be pinned on a …