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.//