Obesity and cancer third most important risk factor for cancer in the United States, just behind tobacco and diet (see Figure). Obesity is the source of about 15% of all preventable cancers. In 2018, Chinese researchers performed a systematic review and comprehensive quantitative meta‐analysis of cohort studies reporting body mass index (BMI) and the risk of 23 cancer types, providing epidemiological evidence supporting the association between BMI and cancer risk. The strongest positive association between BMI and cancer risk was found among patients in North America. The mechanisms by which obesity may increase the risk of cancer are not well understood, but it
Tropical and subtropical moist broadleaf forests Tropical and subtropical moist broadleaf forests Tropical and subtropical moist broadleaf forests (TSMF), also known as tropical moist forests, are a tropical and subtropical forest habitat type defined by the World Wide Fund for Nature. The habitat type is sometimes known as jungle. TSMF are generally found in large, discontinuous patches centered on the equatorial belt and between the Tropics of Cancer and Capricorn, TSMF are characterized by low variability in annual temperature and high levels of rainfall (> annually). Forest composition is dominated by semi-evergreen and evergreen deciduous tree species. These trees number in the thousands and contribute to