0:15 Chris Anderson: William, hi. Good to see you.
0:17 William Kamkwamba: Thanks.
0:18 CA: So, we've got a picture, I think? Where is this?
0:23 WK: This is my home. This is where I live.
0:27 CA: Where? What country?
0:29 WK: In Malawi, Kasungu. In Kasungu. Yeah, Mala.
0:32 CA: OK. Now, you're 19 now?
0:35 WK: Yeah. I'm 19 years now.
0:37 CA: Five years ago you had an idea. What was that?
0:40 WK: I wanted to make a windmill.
0:42 CA: A windmill?
0:43 WK: Yeah.
0:44 CA: What, to power -- for lighting and stuff?
0:48 WK: Yeah.
0:50 CA: So what did you do? How did you realize that?
0:53 WK: After I dropped out of school, I went to library, and I read a book that would -- "Using Energy," and I get information about doing the mill. And I tried, and I made it.
1:16 CA: So you copied -- you exactly copied the design in the book.
1:20 WK: Ah, no. I just --
1:22 CA: What happened?
1:24 WK: In fact, a design of the windmill that was in the book, it has got four -- ah -- three blades, and mine has got four blades.
1:35 CA: The book had three, yours had four.
1:37 WK: Yeah.
1:38 CA: And you made it out of what?
1:40 WK: I made four blades, just because I want to increase power.
1:45 CA: OK.
1:46 WK: Yeah.
1:47 CA: You tested three, and found that four worked better?
1:49 WK: Yeah. I test.
1:51 CA: And what did you make the windmill out of? What materials did you use?
1:56 WK: I use a bicycle frame, and a pulley, and plastic pipe, what then pulls --
2:02 CA: Do we have a picture of that? Can we have the next slide?
2:05 WK: Yeah. The windmill.
2:07 CA: And so, and that windmill, what -- it worked?
2:11 WK: When the wind blows, it rotates and generates.
2:16 CA: How much electricity?
2:17 WK: 12 watts.
2:19 CA: And so, that lit a light for the house? How many lights?
2:24 WK: Four bulbs and two radios.
2:26 CA: Wow.
2:27 WK: Yeah.
2:28 (Applause) CA: Next slide -- so who's that?
2:40 WK: This is my parents, holding the radio.
2:43 CA: So what did they make of -- that you were 14, 15 at the time -- what did they make of this? They were impressed?
2:50 WK: Yeah.
2:51 CA: And so what's your -- what are you going to do with this?
2:53 WK: Um --
2:55 CA: What do you -- I mean -- do you want to build another one?
2:59 WK: Yeah, I want to build another one -- to pump water and irrigation for crops.
3:07 CA: So this one would have to be bigger?
3:09 WK: Yeah.
3:10 CA: How big?
3:11 WK: I think it will produce more than 20 the watts.
3:17 CA: So that would produce irrigation for the entire village?
3:21 WK: Yeah.
3:23 CA: Wow. And so you're talking to people here at TED to get people who might be able to help in some way to realize this dream?
3:32 WK: Yeah, if they can help me with materials, yeah.
3:36 CA: And as you think of your life going forward, you're 19 now, do you picture continuing with this dream of working in energy?
3:46 WK: Yeah. I'm still thinking to work on energy.
3:51 CA: Wow. William, it's a real honor to have you at the TED conference. Thank you so much for coming.
3:57 WK: Thank you.