You have most likely heard about global warming in the news. Global warming is a great example of HEI(Human enviroment interaction. HEI is how humans and the enviroment affect each other in possitive and negitive ways. For example global warming is how humans are negitivly impacting the enviroment. A way the enviroment is possitivly impacting humans is through suppling us with oxygen andd we supply it with CO2 a gas that plants turn into oxygen for us to breath. A better example of this is humans killing wild animals therefor affecting that ecosystem. People are trying to help the enviroment in many ways like cutting down on the amont of toxins we put in the air and the water but in the end we are only solving problums we created.