FARS News Agency: Iran expressed concern over global warming, saying the ongoing economic downturn has halted global efforts to combat climate change. Research and assessment carried out during the Climate Change Enabling Activity Project, under the UN Framework Convention on Climate Change, predicts that if the CO2 concentration doubles by the year 2100, the average temperature in Iran will increase by 1.5 – 4.5 degrees centigrade, press tv reported. The impact of climate change in Iran …