Lecture by Bert van Duijn from Fytagoras at the trade fair Aalsmeer:

The indoor air quality highly affects the wellbeing of human beings. In the living, working and teaching environment the indoor air quality in general is poor. Plants could offer relatively cheap and easy applicable solutions for these problems. In the lecture, remarkable results from different research projects of Fytagoras on the effects of plants in the indoor environment and on human beings are summarized.