Roger heads to Florida to learn about citrus greening, a disease that's killing citrus trees across the state; The guys ask What Is It?; Tom replaces an old vinyl peel-and-stick floor with ceramic tile.

The guys tackle practical solutions for drought. Kevin and Richard tour Lake Mead. Roger replaces a water-guzzling lawn. Kevin meets with Meteorologist Jim Cantore to hear cautionary tales from the front lines of the drought. Richard replaces an old-fashioned toilet.