• 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.

  • In this Wednesday, Aug. 26, 2015 photo, Enid Letourneau looks from the deck of her cottage in Georgia, Vt., at the blue-green algae in St. Albans Bay on Lake Champlain. The town recently reduced the value of 34 homes along the shore by $50,000 each because of the algae, which can be toxic to humans and dogs. (AP Photo/Lisa  Rathke)

    Algae drives down property values on Lake Champlain

    GEORGIA, Vt. (AP) — The two cottages on the shore of Lake Champlain will someday be passed down to her children but Enid Letourneau worries the algae that turns the shoreline pea-soup green each August means they won’t amount to much of an inheritance.