anna kalinsky, let's begin with you.alk about what your grandfather found as an exxon scientist. >> absolutely. like i said, my grandfather worked for exxon for about 40 years. in 1977, he gave a presentation to top exxon management. he laid out very clearly that the planet was warming, that this was because of rising carbon dioxide levels in the atmosphere, and that those levels were rising because of the burning of fossil fuels. at the time he told exxon that humankind had five to 10 years to start really making the hard decisions regarding climate change or the situation could become dire. nermeen: anna kalinsky, how many other scientists at exxon at the time in the 1970's were doing comparable research, copper bowl research to what your grandfather did? >> i don't have an exact number for you, but we know at the time there were other scientists at exxon doing climate research and other organizations in addition to exxon were receiving similar briefings. exxon ceot to play rex tillerson's response. >> we will continue