Section 2

I :

What did you do first/to work on the problem?

K :

I read a lot of books. I also talked with many people,/including scientists. I realized/that science could solve the problem.

I :

What scientific solution/did you find?

K :

I learned about SODIS,/which is a method to purify water. In this method,/people fill plastic bottles/with dirty water/and leave them in the sun/for six to eight hours. The sunlight kills the harmful germs/in the water. Although SODIS is simple and ecological,/it’s too slow. So/I decided to do experiments/to speed up the process. If I had had a laboratory then,/I could have done complex experiments. Since I didn’t have one,/I did my experiments/in the kitchen and garage.