basically a lot of debate about what their ultimate impact s you are certainly talking about for example there are 10% more carbon intense than regular crude, light crude that you would get from places in, for example, in the united states. what robert redford and other climate activists are saying you are lock nothing this climate infrastructure for decades 30, 40 years, it is a financial commitment the united states would be making to explore this area and so that is one of the reasons they are so upset about t >> supporters to of the pipeline project say the project will bring jobs, also help cut our dependence on overseas oil and project that it will have little impact on the environment. fareed zack care ya, for instance, writing on time.com, stopping keystone might make us feel good, but it really wouldn't do anything about climate change." what do we know about the affect on climate change and the number of jobs created? >> on the jobs front that is