• In this March 29, 2006 photo, a skier poses for a photograph on Portage Lake in front of Portage Glacier, about 50 miles south of Anchorage, Alaska. The Portage Glacier, which is a major Alaska tourist destination near Anchorage has retreated so far it no longer can be seen from a multimillion-dollar visitors center built in 1986.  President Obama leaves Monday, Aug. 31, 2015 for a three-day visit to the 49th state in which he will speak at a State Department climate change conference and become the first president to visit the Alaska Arctic. There and even in the sub-Arctic part of the state, he will see the damage caused by warming, damage that has been evident to scientists for years. (Evan R. Steinhauser/Anchorage Dispatch News via AP, File)

    Global warming carving changes into Alaska in fire and ice

    ANCHORAGE, Alaska (AP) — Global warming is carving measurable changes into Alaska, and President Barack Obama is about to see it.

    Updated: 1:41 pm

  • In this Aug. 2, 2015, photo provided by The Ocean Cleanup shows, Mega Expedition crew members, Mario Merkus, left, and Serena Cunsolo on mother ship R/V Ocean Starr with the results of trawling with one 6 meter-wide net for one hour in the Great Pacific Garbage Patch. Scientists and volunteers who have spent the last month gathering data on how much plastic garbage is floating in the Pacific Ocean say most of the trash is medium to large-sized pieces, as opposed to tiny ones. Volunteer crews on 30 boats have been measuring the size and mapping the location of tons of plastic waste floating between the West Coast and Hawaii. Three of the boats, including this 171-foot mother ship, returned to San Francisco on Sunday, Aug. 23, 2015. (The Ocean Cleanup via AP)-

    Boaters mapping Pacific garbage to arrive in San Francisco

    SAN FRANCISCO (AP) — Far away from California’s coast, where the Pacific Ocean currents swirl, the blue of the sea was replaced by fishing nets, buckets, buoys, laundry baskets and unidentifiable pieces of plastic that floated past the Ocean Star, a ship carrying a team of scientists and volunteers gathering data on plastic garbage.