YPE html PUBLIC “-//W3C//DTD XHTML 1.0 Transitional//EN” “http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd”> Eighteen-year-old Tucker Sawyer of Hays County, TX, had a flash of inspiration while sitting in his high school chemistry class. Reflecting on the perennial issue of droughts in his home state, Sawyer realized that a lot of water is wasted as a by-product of combustion vehicles. If he could somehow collect and condense the water vapor released in combustion, he would be able to reclaim hundreds of millions of gallons of water per week. “I thought, wait a minute, we’re wasting hundreds of millions of gallons of water vapor all the time when we drive. Why don’t we do anything with that? And it took off from there,” Sawyer recounted. Sawyer’s idea was to affix a heat exchanger onto a vehicle’s exhaust system to collect the wasted water vapor. Little did he know, he was about to embark on a gruelling—but rewarding—engineering journey. Sawyer isn’t the type of person to have an idea and leave it at that. Ever since his tenth-grade chemistry class, he’s had a curiosity for science and the drive to apply his knowledge. That year, he ...