Source: CEMAV, Center of Design and Production of Audiovisual Media, of the UNED.
. There is scientific evidence that the global climate will be significantly altered in the TWENTY-first century, as a result of increased concentrations of greenhouse gases. Although there is general agreement on these conclusions there is a large uncertainty with respect to the magnitude of this problem. We invite you to reflect on all of this. . 
.Technical data sheet CHANNEL-UNED:
