The world's average temperature hit a record high of 17.24 C last Friday in the latest sign of global warming, the World Meteorological Organization said Monday based on preliminary analysis.The world had its hottest week last week, following its hottest June on record, with the WMO expecting temperatures to rise further as the El Nino phenomenon, in which ocean surface temperatures rise in the central and eastern Pacific Ocean, occurs for the first time in seven years.The previous record average global temperature was 16.94 C hit on Aug. 16, 2016, when El Nino last occurred. The current El…READ FULL ARTICLE