<human>: What are the latest research results on the causes of breast cancer?
<bot>: The latest research results indicate that a combination of genetic and environmental factors can cause breast cancer. Studies suggest that genes play an important role in increasing one's risk, while lifestyle choices such as smoking, obesity, and lack of physical activity may increase their chances of developing breast cancer. Additionally, certain medications, hormonal changes during pregnancy or menopause, radiation exposure, and some industrial chemicals have also been linked to increased risks.