Complex sentence: Although it is notable that these "green" constructions often come at a high financial cost (Kellogg, 2011) As these groups are quite small, members need to feel empowered, included and comfortable speaking and sharing ideas.
Split into simpler sentences: Although it is notable that these "green" constructions often come at a high financial cost (Kellogg, 2011). RAs these groups are quite small, members need to feel empowered, included and comfortable speaking and sharing ideas.