Complex sentence: Later on, in 2006, the project Masdar City was the first contribution of Abu Dhabi which concerned about global warming, in particular on the implementation of natural sustainability in people ´ s daily life.
Split into simpler sentences: Later on, in 2006, the project Masdar City was the first contribution of Abu Dhabi, which concerned about global warming. In particular on the implementation of natural sustainability in people ´ s daily life.