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.
A list of the human causes of air pollution includes vehicles, domestic smoke and heating, aircraft pollution, outdoor fires, and incineration of waste. To reduce the problems of air pollution, people should be more aware of their actions in these areas. 1  Human Activity: An overview of how human activity affects air pollution. 2  Air Toxics: A look at mercury and other air toxic emissions associated with production of electricity.