Climate activist and former Vice President Al Gore has long warned of what might happen if the world reaches the worst-case climate change scenario. Recently, he made an empassioned speech at the World Economic Forum summit in Davos, Switzerland, that emphasized just how bad things might get.

@climateschool #davos #algore #climatechange ♬ Time – Hans Zimmer

He spoke of the thin blue line in space, which is the troposphere containing oxygen and is only five to seven kilometers thick. On a positive note, he talked about how 90 percent of new electricity generation worldwide last year was renewable, and it’s now the cheapest option in many areas. He also pointed out that humans are pumping out 162 million tons of greenhouse gasses every day, causing as much extra heat as 600,000 Hiroshima-class atomic bombs exploding daily on Earth. There are a multitude of problems Gore linked back to climate change, including boiling oceans and atmospheric rivers creating rain bombs, sucking moisture from land triggering droughts, melting ice caps raising sea levels, and forcing climate refugees numbering 1 billion by century’s end. In terms of the latter, he noted how authoritarianism has been a response to these migrations caused by global warming.

Al Gore has been a leader in the fight against climate change for decades. He served as Vice President of the United States from 1993 to 2001, and since then has founded two organizations, written several books, and given countless speeches on the topic. In 2006, he released the documentary An Inconvenient Truth, which brought climate change into mainstream conversation.

In 2005, Al Gore founded The Climate Reality Project to promote awareness of global warming pollution and its dangers. Through this organization he works with scientists, business leaders, and governments around the world to develop solutions to the climate crisis. He also created a website that tracks big polluters by name in order to hold them accountable for their emissions.