In the first article at your link, an interview with RFK, Jr. from Nov. 19, 2003, here's a gem:
You've endorsed John Kerry in the 2004 race. Do you think he'll champion the environment more boldly than Gore in his campaign?
I think he already is; he's already framed this as his issue. I like all of the Democratic candidates and they're all relatively good on the environment. Actually, I don't know anything about Wes Clark on this issue, I haven't talked to him. But I have good friends who have and they say he's expressed strong feelings on the environment. So I think all the Democratic candidates are in the right place.
But Kerry has the best record of any senator; he has a 96 percent lifetime rating with the League of Conservation Voters. This has been a passion for him since he got into public life. He was the Massachusetts organizer for Earth Day in 1970, and he has fought hard for fuel efficiency standards, which is now the holy grail of the environmental movement. He's been the one consistent champion on that issue.
I've known Kerry almost all my life and he's an outdoorsman, he loves being on the water, he loves fishing. I've spent a lot of time on Nantucket Sound with him. Last summer he called my brother Max and asked him to come to Wood's Hole to go windsurfing with him, and they ended up windsurfing all the way from Wood's Hole to Nantucket, which is 45 miles, over open ocean. And that's pretty good for a 56-year-old guy. And he wasn't calling a press conference or anything. He just did it because they got into the water. It's genuine.
This from a guy who has a HUGE record of solid environmental advocacy and real results himself.