Complex sentence: Bunker Roy claims in the TED talk that when he spoke with a forester for advise on growing trees in his campus, he was told that the effort wasn't worth it because there was no water in the land and the soil was too rocky.
Split into simpler sentences: Bunker Roy claims in the TED talk that he spoke with a forester for advise on growing trees in his campus. The forester subsequently told him that the effort wasn't worth it because there was no water in the land and the soil was too rocky.