過去一年尤其動盪。里亞爾暴跌引發12月下旬德黑蘭巴扎（bazaar）的抗議並迅速蔓延全國；安全部隊進行殘酷鎮壓，造成數千人死亡。其後里亞爾持續走弱，物價進一步攀升。
"Clearly this area needs further research to find out if it's causative or not."
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It's also expensive and some environmental groups argue that emission reductions can be achieved at a lower cost, using more existing technology such as wind power, solar, and electric cars.
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