The filmmaker, explorer and activist talks with Chris Hayes about contending with climate deniers and building a bottom-up movement to reduce emissions.Sept. 16, 2015
UP NEXT
'We're in a place to win the battle': Kerry sounds hopeful note on climate (with a big 'if')
08:51
Biden launches Climate Corps; pairs new jobs with climate, infrastructure work
06:30
Kyra Sedgwick on taking climate action: 'You can't just do this halfway'
04:45
Lewis Pugh: Rivers are ‘arteries of our planet,’ we need ‘healthy rivers’ for a ‘healthy planet’
04:25
One-on-one with Spencer Glendon
07:42
Young Republicans are pushing their party on climate change