Smoking greatly increases health risks, causing over 100,000 deaths per year in the UK. It is linked to many cancers and respiratory/circulatory conditions. Smoking damages lungs and blood vessels. It also increases risks for babies during pregnancy, such as premature birth, low birth weight, and infant death. Even secondhand smoke increases cancer and lung disease risks for non-smokers. Smoking is one of the largest preventable causes of illness and death.