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.
How can air pollution cause global warming when under natural conditions, these very same gases make an important part of the atmosphere? And... The delicate balance of these gases could be upset by the addition of more gases produced when people burn fossil fuels to power cars, factories, and other civilized things.