Yeah. right.

Just add it to all the vacation emissions Air Force One and the motorcade puts out.

Pres also urges nation to protect National Parks from ravages of climate change and pollution. Says Earth "the only planet we've got."

— Mark Knoller (@markknoller)

Not often you see a presidential motorcade in @YosemiteNPS. Nice novelty for the wildlife. pic.twitter.com/Vh2VvYLsV5

— Mark Knoller (@markknoller)and

The beauty of the National Park System is ‘it belongs to everybody," says Pres Obama, urging Americans to visit.

— Mark Knoller (@markknoller) June 18, 2016

We are SO excited to welcome President and Mrs. Obama here today! Park will be completely closed from 1 – 4:30 p.m. Bat Flight at 7:30 p.m.

— Carlsbad Caverns NPS (@CavernsNPS)