How are climate crisis and mutation related?

Guys....it is crisis season !!!!
Terrorism, food shortage, rising cost of crude oil . . . we have no dearth of problems already. We sure are in a big mess. To top it all, there is now climate crisis. What was hitherto dismissed as an impossibility has turned out to be real. People have long considered the earth's atmosphere to be too big to be affected by human activities of any scale. But, day upon day, year upon year, the extent to which our activities impact the environment has only increased. And today the levels of carbon di-oxide the atmosphere has reached it highest level in several million years. The movie "An Inconvenient Truth" puts it a clear terms. Truly, a brilliant piece of work from Al Gore.

Over the past few years, as the effects of the problem are being witnessed all around the world in the form of floods, drought, tornadoes, melting of polar ice etc, there is a lot of attention and action...be it the Kyoto Protocol or the recent announcement by Richard Branson, CEO of Virgin Atlantic promising $ 25 million for anyone who comes up with a viable solution for capturing atmospheric 1 billion tonns of CO2 a year, also called Carbon Sequestration in scientific jargon.
Now, we live in the age of technology....the age where innovation in problem solving is a craze.
So it is with carbon sequestration. A great number research bodies around the world are currently working on the problem. Here is an interesting paper on the topic.
http://www.springerlink.com/content/bm58l17348144812/fulltext.pdf

A good read.!!!. It explains why CO2 generated from burning fossil fuels is virually free from the C14-the radioactive istope of carbon-that is believed to be the primary cause for aging and cancer in humans (or for that matter any living being). The paper then proposes the use of this CO2 to cultivate crops. Food obtained this way will be free from radiocarbon and is therefore "safer" than the conventional food we have been consuming since time immemorial.

But....is there a potential pitfall in this scheme. Does the minute amount of radio carbon (the concentration of C14 is about one in 750 billion C atoms, the rest of the C atoms are C12) in the human body play some critical role?.
While it is true that C14 decay causes damages to the DNA and RNA structures some of which are irreparable, isn't it also true that such 'damages' to the genetic material also cause mutations, some of which are critical for evolution?. Mutation that adds some randomness to the traits that an offspring inherits from its parents. It is what causes diversity, a critical factor for survival and evolution of life forms in the long term.
Perhaps C14 atoms are nature's way of adding some color and variety to the life forms on earth enabling them to change and adapt over extended period of time to an ever changing environment.