Exclusive Obama on Threats to Nature, Power of National Parks(03)

Exclusive Obama on Threats to Nature, Power of National Parks(03)


Image gallery: President Obama Warns About Climate Change While In Yosemite

President Obama in Yosemite 'Climate change is a reality' BBC News President Obama in Yosemite 'Climate change is a reality' BBC News Obama in Yosemite Climate change not just a threat, but a reality Exclusive Obama on Threats to Nature, Power of National Parks Climate change deal is a turning point for world, Obama says