Complex sentence: According to their peer-reviewed report, oil production in 2030 would not exceed 75 mb/d while the IEA forecasts a production of 105 mb/d. As mentioned by the lead author, Dr. Kjell Aleklett, IEA's reports are "political documents".
Split into simpler sentences: According to their peer-reviewed report, oil production in 2030 would not exceed while the IEA forecasts a production of. The lead author of the report, Dr. Kjell Aleklett, has claimed that IEA's reports are "political documents".