Rolf Halden Chemicals and pesticides used within homes, agriculture and industries pour into our environment. Unfortunately, the poor effects of these compounds on the human and ecological environments are often overlooked. Rolf Halden and a team of experts have created a new study that tracks the use of chemicals and pesticides known as fiproles. These contaminants have been found to kill off pollinating insects that are vital to human and ecological lifestyles. The study continues to explore the effects of these contaminants around the world, including human health, soil and ground contamination and pollution.