earthquake. >> continues to get warmer, ultimate it's going to happen. at least all signs point to yes. is this going to cap more and more in the park? >> it's one of our concerns. the field work been done here in modelling as well. it's been estimated denali was 75% covered in permafrost in 1960 and by 2016, pr60, 20%. like how it would affect the floor and the floor and fauna, we expect major changes here and somewhere in the arctic. >> in new york city, someone who isn't affected by this or at least you don't think you're affected on a detail baily. what could you do? >> daily choices that you make. just, light switches on and off. the political decisions that you make. how you vote. the products you decide to buy or not buy.