Lester Brown, Earth Policy Institute & Dr. Brenda Ekwurzel, Union of Concerned Scientists join Thom Hartmann. The warming of the climate is unequivocal. That's one of the major findings of a new report put out by the United Nation's International Panel on Climate Change. The report - released every six years - is the most comprehensive report on climate change and global warming. This year's report - worked on by over 800 authors from dozens of countries - won't be released in full until Monday - but the summary for policymakers was released earlier today - and it highlights the report's key findings. Among them - man-made climate change is near certain - and climate change is already effecting extreme and severe weather events across the globe.

Professor Gary May, Professor Emeritus of History-University of Delaware/The Daily Beast/Bending Toward Justice: The Voting Rights Act and the Transformation of American Democracy joins Thom. And over 50 years ago civil rights protestors were brutally beaten while marching to Montgomery, Alabama. That incident sparked the creation of one of the most important pieces of legislation ever written. We’ll be going in-depth on the Voting Rights Act.

For tonight's Conversations with Great Minds - I'm joined by one of America's leading experts on nutrition - someone who's been a big influence on people looking to lead healthy lives - including me! Dr. Michael Greger is a licensed Medical Doctor in general practitice specializing in clinical nutrition - and a founding member and fellow at the American College of Lifestyle Medicine. He's also the Director of Public Health and Animal Agriculture at the Humane Society of the United States, and the founder of the Nutrition Facts dot org blog. Dr. Greger is also the author of a number of bestselling books - including his latest "How Not to Die: Discover the Foods Scientifically Proven to Prevent and Reverse Disease."

For more information on the stories we've covered visit our websites at thomhartmann.com - freespeech.org - and RT.com. You can also watch tonight's show on Hulu - at Hulu.com/THE BIG PICTURE and over at The Big Picture YouTube page. And - be sure to check us out on Facebook and Twitter!

Turn on the news these days and you're bound to hear some kind of fretting about millennials and their views on the world. Usually - the conversation revolves around questions like "why are millennials so lazy?" or "why do they spend so much time on social media?" - and while questions like that are kind of trite - they have a point. Millennials ARE different from other generations. Very - different in fact - especially when it comes to politics. My guest for tonight's Conversations with Great Minds has tried to find out why. Joining me now now is David Cahn. David is a journalist - an activist - a national leader of the Junior State of America - and an experienced campaign organizer. He also writes for the Huffington Post and along with his brother Jack - is the co-author of "When Millennials Rule: The Reshaping of America."

For more information on the stories we've covered visit our websites at thomhartmann.com - freespeech.org - and RT.com. You can also watch tonight's show on Hulu - at Hulu.com/THE BIG PICTURE and over at The Big Picture YouTube page. And - be sure to check us out on Facebook and Twitter!

Kurt Walters, Public Campaign Action Fund & Bob Edgar, Common Cause & Shane Larson, Communication Workers of America (CWA) all join Thom Hartmann. Imagine how productive Congress would be if the filibuster were a thing of the past. Things would actually get done on Capitol Hill for the benefit of ALL Americans. But is saying goodbye to the filibuster even realistic? For tonight's Bigger Picture discussion we're going to tackle the issue of the filibuster: what it is, it's history, how it's been used, and what are the current political dynamics shaping filibuster reform.

Former Senator Tom Hayden is an American social and political activist and politician, known for the anti-war and civil right movements of the 1960s.

Thom's guest for tonight's Conversations with Great Minds is one of America's most influential thinkers on muliticulturalism and race - Professor Derald Wing Sue. Currently a Professor of Psychology and Education at the Teacher's College at Columbia University - Professor Sue has been at the forefront of some the most forward-thinking scholarship on race relations in America. His book "Microaggressions in Everyday Life" is now considered a classic of its kind - and it won the inaugural UnityFirst dot com National Diversity and Inclusion Book Prize .Professor Sue is also the co-founder and first President of the Asian American Psychological Association. His new book - "Race Talk and the Conspiracy of Silence: Understanding and Facilitating Difficult Dialogues on Race" - is a fascinating look into how we talk about race and racism.