Complex sentence: It was out of this experience, among others, that he helped shape the process and substance of PA21, still officially the blueprint for sustainable development in the Philippines, although presently marginalized by the current controversial government of the Philippines.
Split into simpler sentences: It was out of this experience, among others, that he helped shape the process and substance of PA21. PA21 is still officially the blueprint for sustainable development in the Philippines, although presently marginalized by the current controversial government of the Philippines.