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00:15 Chris Anderson: William, hi. Good to see you.

00:17 William Kamkwamba: Thanks.

00:18 CA: So, we've got a picture, I think? Where is this?

00:23 WK: This is my home. This is where I live.

00:27 CA: Where? What country?

00:29 WK: In Malawi, Kasungu. In Kasungu. Yeah, Mala.

00:32 CA: OK. Now, you're 19 now?

00:35 WK: Yeah. I'm 19 years now.

00:37 CA: Five years ago you had an idea. What was that?

00:40 WK: I wanted to make a windmill.

00:42 CA: A windmill?

00:43 WK: Yeah.

00:44 CA: What, to power -- for lighting and stuff?

00:48 WK: Yeah.

00:50 CA: So what did you do? How did you realize that?

00:53 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.

01:06 (Applause)

01:16 CA: So you copied -- you exactly copied the design in the book.

01:20 WK: Ah, no. I just --

01:22 CA: What happened?

01:24 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.

01:35 CA: The book had three, yours had four.

01:37 WK: Yeah.

01:38 CA: And you made it out of what?

01:40 WK: I made four blades, just because I want to increase power.

01:45 CA: OK.

01:46 WK: Yeah.

01:47 CA: You tested three, and found that four worked better?

01:49 WK: Yeah. I test.

01:51 CA: And what did you make the windmill out of? What materials did you use?

01:56 WK: I use a bicycle frame, and a pulley, and plastic pipe, what then pulls --

02:02 CA: Do we have a picture of that? Can we have the next slide?

02:05 WK: Yeah. The windmill.

02:07 CA: And so, and that windmill, what -- it worked?

02:11 WK: When the wind blows, it rotates and generates.

02:16 CA: How much electricity?

02:17 WK: 12 watts.

02:19 CA: And so, that lit a light for the house? How many lights?

02:24 WK: Four bulbs and two radios.

02:26 CA: Wow.

02:27 WK: Yeah.

02:28 (Applause) CA: Next slide -- so who's that?

02:40 WK: This is my parents, holding the radio.

02:43 CA: So what did they make of -- that you were 14, 15 at the time -- what did they make of this? They were impressed?

02:50 WK: Yeah.

02:51 CA: And so what's your -- what are you going to do with this?

02:53 WK: Um --

02:55 CA: What do you -- I mean -- do you want to build another one?

02:59 WK: Yeah, I want to build another one -- to pump water and irrigation for crops.

03:07 CA: So this one would have to be bigger?

03:09 WK: Yeah.

03:10 CA: How big?

03:11 WK: I think it will produce more than 20 the watts.

03:17 CA: So that would produce irrigation for the entire village?

03:21 WK: Yeah.

03:23 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?

03:32 WK: Yeah, if they can help me with materials, yeah.

03:36 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?

03:46 WK: Yeah. I'm still thinking to work on energy.

03:51 CA: Wow. William, it's a real honor to have you at the TED conference. Thank you so much for coming.

03:57 WK: Thank you.

03:59 (Applause)