To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Share Embed Share URL Video File Node URL Embed Code <iframe title="MRC TV video player" width="640" height="360" src="https://www.mrctv.org/embed/2772" allowfullscreen></iframe> Responsive Embed Code Embed Code <iframe title="MRC TV video player" width="640" height="360" src="https://www.mrctv.org/embed/2772" allowfullscreen></iframe> Meredith Vieira asks Al Gore to “explain the science” of global warming on NBC “Today” July 5, 2007. Gore blamed coal and gasoline carbon emissions for global climate change.