Obama brought his family late on Friday to Yosemite, one of the nation's most popular national parks, on a working vacation.<br />The trip was aimed at celebrating the centennial of the National Park Service, making the case for curbing climate change and encouraging more investment in conservation.<br />Obama highlighted his plan to reduce climate-changing carbon emissions and an international deal spurring other countries to take similar steps.<br />He said climate change is putting national parks at risk.<br />"That's not the legacy I think any of us want to leave," he said.<br />Obama has added 20 sites to the national park system during his presidency and protected more than 265 million acres of public lands and waters from development - more than any other president.<br />"We've got to do a lot more," he said.
