In the first part of this video, researchers take viewers into their labs to explain the biotechnology that is involved in creating improved crops, soil and fertilizer. The second part examines the beneficial role played by fire in the natural environment. Documents renewal of the ecosystem following the devastating Yellowstone fires in 1988 and successful attempts to restore midwestern prairies through the use of controlled burning. Executive producer, Bill Kurtis ; senior producer, Sharon Barrett ; music, David Huizenga. [Part 1] producer, Rich Goodman ; editor, Greg Snider. [Part 2] editor, Gary Wright.