enjoy things like our amazing national parks because great americans like teddy roosevelt and marjorie douglas and a bunch of ordinary folks whose names are not in the history books. they fought to protect our national inheritance. now it's our turn to ensure that this remains the birth right of all americans for generations to come. so many people here are active in your communities doing what's needed. the young people who are here the next generation. they're way ahead of us. just make sure we're not disappointed and stand up and do what's right before it's too late. thank you very much everybody. thank you. [applause]. >>> there we have a president obama at the everglades on this earth day talking about climate change and its impact not just on the environment but also on the economy. the president taking some time here to shake hands. let's bring in our senior washington correspondent. we're trying to juggle things. the president was actually early for this event today. give us a bit of the background on it, what the president was hoping to highlight today on this earth day. >> well tony