Share 'N' Voice: What am I?

So for this Share 'N' Voice I thought it would be fun to play a game.  The object is to discover what environmentally friendly item I am talking about.  There are 5 items.  Take a guess at one or two.  Good luck to everyone :)  I will post the answers in one week.

1. You can purchase me at most stores.  I can carry items from the store to your home.  I am usually able to fold up into a small size for compact storage and the ability to take me anywhere.  What am I?
2. I can light up a room just as well as my traditional friend.  I only use a fraction of the amount of electricity.  Some of us even get an Energy Star Label.  What am I?
3. I am not available for use at all times.  I am a renewable energy source.  I convert light emitted from the star at the center of the solar system into electricity.  What am I?
4. I am 95%-99% derived from mother nature.  I display the "Design for the Environment Logo".  Clorox is my maker.  What am I?
5. I am very tall.  I am a rotary device that extracts energy.  The movement of air allows me to do my job.  What am I?