For many years, scientists have studied the role a person's genes play in different types of diseases, which are very commonly found among people. Health problems and serious conditions like Cancer, heart diseases, mental health problems and even diabetes, the researchers have made consistent efforts over the years in working upon and examining how these little differences in a person's genes can shape such kind of hazardous health conditions that last for a lifetime.  Understanding small variants  A new study conducted at Harvard University gave surprising results to the researchers. It is suggested that apart from a person's genes, the environment in which a person lives makes a strong and significant impact on health and well-being. During the time of this research, the scientists studied and focused on data from 20 years. The researchers were involved in testing over 115,000 different associations between 619 environmental exposures. That provided them with 305 health outcomes. During this whole research…