Complex sentence: In 2004, total world reserves were estimated to be 1.25 trillion barrels and daily consumption was about 85 million barrels, shifting the estimated oil depletion year to 2057.
Split into simpler sentences: In 2004, total world were estimated to be 1.25 trillion barrels and daily consumption was about 85 million barrels. This lowered the estimated oil depletion year to 2057.