work. on his expeditions he often doesn t meet people for days on end no assistant no destruction. he does everything himself. he has walked the entire length of four rivers in greenland interior rivers created by climate change no where else can you see the results of global warming is drastically as here greenland is now believed to be losing more than two hundred seventy billion tons of ice a year. at point six sixty on the greenland ice sheet hundreds of tourists stay to witness the changes sometimes it s twenty degrees celsius here. for company in the research is that they went to the measuring stations and they took the data and evaluations. these huge changes exceeded their own full costs. but these are always losses. in greenland so much melt water is generated each year