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.
Haze from the effect of high air pollution is seen over London. Photograph: Amer Ghazzal/Demotix/Corbis The high air pollution across central and southern England and parts of Wales is due to light easterly winds bringing pollutants from the continent and allowing local pollution to linger close to where it is produced. Dust blown up from the Sahara may also be a factor, according to Defra.