. >>>> whahat will happepen a aft- 100 years after the abandonment of the well. >> the latest signs from the gas fields of america seems to support his conclusion. according too the study, and another from cornell university, wells are leaking gas and other chemicals into the air of a rate of about three times what the industry can use. the government suggests that hundreds of thousands of jobs will be created helping to offset the 24% unemployment. small-scale farmers believe that this is shortsighted. >> it is thinking like this that scientists have been trying to instill in governmentnt and publblic health posisitions with oversight over the drilling activities. what is in the nature? nobody knows for sure and most companies and not telling. this group has worked with the u.s. national science foundation and the massachusetts institute of technology to uncover a list of 246 products used by the natural gass industry. >> one of our staff set out to systematically set up a database in order to lolook at the long list of chemicals that we have at hand. those products that have health 1%-

itit's happepening 10 toto 100 s faster thahan at any time e in e last 50 0 million yeyears. in f, since the 191900s, earlyly 1900, the oceaean is 3 m more acidici. >> ph, oror reallyly the aciditf the ocecean, is chahanging as a result o of carbon dioxixide n the atmosphere. this is ultimatately sortrt of the eviln of f climate e change. >> we look at global warming. we talk about the changes in our atmosphere. we need to look at the changes in our ocean. >> wewe've been pumumping carbon didioxide into the atmosphehere, especially since t the industril revolution, with the burning of fossil f fuels. and that cbobon dioxide has to go somewhere, and some of that is going into the oceans. they estimate about 30% has gone into the oceans. and the problem in the oceans is it has to react to that carbon dioxide. and that's how we get the phenomenon of ocean acidification. >> over 70% of all of the oxygen in our air, the oxygen we breathe, is produced by phytoplankton in the ocean. that means when you're putting that at risk by changes in ph, you're putting at risk the very air we