looking out into the valley you can see the lemon terraces. the lemon grove totals about 2,700 trees and 1,300 steps. tough on the knees but good for the heart. lemons are your life. and at 87 years old, luigi is still working. you have lemon juice in your veins. >> your grandfather said -- >> i still have to discover. >> reporter: john marco is the seventh generation here and he will be contending with a changing climate and another challenge. without tourism this is not sustainable. impossible to compete with the other countries that produce lemons. >> reporter: tourists pre-covid made up more than 50% of their business. they would come for tours or tastings. >> reporter: you eat them almost like an apple. it is organic. his wife runs the cooking classes. with no tourists she made a lemon pasta for us, garlic, parlsly and lemon. we joined the three generations for lunch. when you were away at school did you miss all of this? the family, of course. the pasta. >> we ate it almost every day. >> reporter: others at the table, including the repor