dirt
yello paint
A fungi or bacterial infection in the bed of the nail can cause the nail to turn orange. Smoking cigarettes frequently can also cause the nails to turn orange.
photosyntosis
Smoking can cause yellow fingernails due to the chemicals in cigarettes staining the nails over time.
Most likely it's the end of the peas' growing season in which they will turn yellow and die off.
Lily leaves turn yellow due to a lack of nutrients, such as nitrogen, or excessive watering, which can lead to root rot. This causes the leaves to lose their green color and turn yellow.
Betacarotene found in fruits and vegetables can cause fingernails to turn orange when taken in high quantities.
Zucchinis turn yellow after picking due to the natural ripening process, which causes the chlorophyll in the vegetable to break down and reveal the yellow pigments underneath.
smoking
Some varieties of tomato have yellow fruits and therefore this is perfectly normal.
YES its one of those tell tale signs like your clothes smell of it and your fingers also sometimes tint yellow and your fingernails seem yellow and unhealthy, if your trying to catch someone out smell their breath you should be able to tell if not look for one of the other signs
Cucumbers turn yellow due to overripening or exposure to sunlight, which causes a pigment called chlorophyll to break down and reveal the yellow pigments underneath.