Nazi Germany had a strong anti-tobacco movement, as pioneering research by Franz H. Müller in 1939 demonstrated a causal link between smoking and lung cancer.[384] The Reich Health Office took measures to try to limit smoking, including producing lectures and pamphlets.[385] Smoking was banned in many workplaces, on trains, and among on-duty members of the military.[386] Government agencies also worked to control other carcinogenic substances such as asbestos and pesticides.[387] As part of a general public health campaign, water supplies were cleaned up, lead and mercury were removed from consumer products, and women were urged to undergo regular screenings for breast cancer.[388]