The Natural Geo Crisis webinar held on June 15, at 11:30 . . In this webinar, Dr. John Lambert, Dr. Peter Wigand, Dr. Ali Mohammadi, and Dr, Razyeh Lak, spoke in various fields such as subsidence, the effects of global warming on landscapes, and evidences of the salt effects of Lake Urmia. The end of this webinar was accompanied by an expert panel.