Abstract: This present paper will mainly focus on the relevance and practical implication of the study of environmental ethics and it will also exhibit how humans must realize the value of the environment and its sustainability and along with that it will also focus on how the potential adverse health effects of environmental factors are generally well recognized by the medical community but not always well understood. In its broadest sense, the environment is at least partially responsible for all diseases except those determined solely by genetics and includes such factors as housing, nutrition, socioeconomic status, and lifestyle. As a branch of ethics, environmental ethics deals with the study of normative issues and principles relating to human interactions with the natural environment. It comprises an increasingly significant field of applied ethics, crucial for the guidance of individuals, corporations and governments in shaping the principles affecting their lifestyles, their actions and their policies across the entire range of environmental issues. It is very easy for all of us to carry out our duties and responsibility properly that may lead to sustainable development which we could hope for a healthy environment for our future generations. Its scope includes the interpretation and application of the precautionary principle, policies of sustainable development, grounds and policies for biodiversity preservation and the nature and basis of obligations to assist adaptation to global warming and to mitigate the anthropogenic greenhouse gas emissions widely recognized to constitute one of its principal sources. It is a sole purpose of environmental ethics to make us realize about the indiscriminate and destructive human activities are welcoming threat to our environment.