green peace. arctic shipping will also cash in. if the ice disappears in summers. but if the arctic continues to heat as predicted, it will increase global warming and may also disrupt ocean currents on which we depend. and wildlife would be harmed. polar bears rely on sea ice to do their hunting. all of the type, our green house gasses keep on rising. roger harriban, bbc news. still to come, mitt romney. family insight from romney s boys that you won t get anywhere else. you re watching world news now. announcer: abc s world news now will continue after this from our abc stations. om our abc stations.xññ!ñkús