Do you know of any good green gadgets?

[spursgolden]

So I have to do a Speech on something 'green' and I decided to go with green gadgets. Problem is... I'm having trouble picking them, so I need your help.

I'm looking for something:
1) Practical
2) Interesting and
3) Something that's a bit 'out there'.

Sources and links would also help me out a lot. Thanks in advance!

[Dusty]

You might just log on to " spaceweather.com " and take a look at the SUN. Most of this green stuff is just crap. There are really only 3 things that effect this planets (and currently MARS as well) climate. Sun spots (or currently the lack there of) volcanic erruptions and the temp of the oceans. Currently there is zip solar activity, the oceans are cooling and there is little volcanic action. May even have somthing to do with the fact that Mars has been cooling for the last decade too.