Excess body weight has increased dramatically around the world over the past 4 d

Excess body weight has increased dramatically around the world over the past 4 decades, posing significant health problems for millions. Is this 21st century public health challenge the product of genetics gone suddenly awry, or is there something (or several somethings) in the environment that we’re being exposed to which triggered this epidemic?
Make sure to support your reason(s) with evidence – e.g., a textbook reading, newspaper article, scientific publication, a video or quote from an expert in fermentation, or a reputable website. Please use a complete in-text citation when listing references using APA format.