Hill: President Obama warned of the effects of climate change in remarks from Sentinel Bridge at Yosemite National Park on Saturday.
Obama touted the National Park System, saying its a true expression of our democracy and is something we have in common, something we share.
The president touted the Every Kind in a Park initiative, launched early last year to help elementary-school children visit national parks for free, while interacting with a crowd of children.
"We want to make sure that...