The DNA repair ability of a cell is vital to the integrity of its genome and thus to the normal functionality of that organism. Many genes that were initially shown to influence life span have turned out to be involved in DNA damage repair and protection.
Examples for negative production externalities include: 1  Air pollution from burning fossil fuels. 2  This activity causes damages to crops, (historic) buildings and public health. 3  Anthropogenic climate change as a consequence of greenhouse gas emissions from burning oil, gas, and coal.
Natural Air Pollution. Whilst man-made pollution and poor air quality is major environmental concern, there are many natural sources of pollution which are often much greater than their man-made counterparts. Natural sources of sulphur dioxide include release from volcanoes, biological decay and forest fires.