According to Luxembourg law, the annual average radon gas concentration in dwellings should not exceed 150 becquerel (Bq)/m3, a stricter limit than that recommended by the EU.4 Private dwellings are also checked for dampness and chemicals. A new “passive smoking” law was introduced in 2006, forbidding the advertising of tobacco products and banning smoking in public places. The related noise action plans are being prepared and draft plans were presented in early 2009.