Earth Day Jeopardy!

With a music history flair!

From Environmental Defense:

Earth Day Jeopardy

1. The American President whose eleven-state conservation tour was a precursor to Earth Day...
   

2. United States Senator who first proposed Earth Day...
   

3. The U.S. city that issued the first Earth Day proclamation...

4. Folk singer who was the keynote speaker and performer during the first Earth Day march in Washington D.C....

5. Popular Earth Day slogan sung during the first Earth Day march...

6. Presently, the number of countries that celebrate Earth Day...

Submit answers via the comments and we'll see who is the most Earth-friendly, musically and politically savvy one of ya out there. Enjoy!