Complex sentence: The Sanders family are ignorant to the fact that Lyman and his company are actually not eco-friendly and that they want to cut down the forest to build houses and a shopping mall "with a forest theme".
Split into simpler sentences: The Sanders family is ignorant to the fact that Lyman and his company are actually not eco-friendly. Instead Lyman plans to cut down the forest to build houses and a shopping mall "with a forest theme".