Dr. B.C. 'Bill' Wolverton is a retired NASA scientist and has received numerous patents and wards for his pioneering research into enviromental pollution. He lectured throughout the world and his publication include Eco-friendly Houseplants(or How to Grow Fresh Air), now in fifteen translations, and Growing Clean Water-Nature's Solution to Water Pollution.
Kozaburo Takenaka, Founder of Takenaka Garden Afforestation, the topmost plant leasing company in Japan, has created many styles of green enviroments in all manner of indoor and outdoor spaces. He has conducted research with universities into green plant related technologies, with experiments in natural and artificial enviroments, soil developement and water resources.