Why do some plants have waxy leaves?

Some plants have waxy leaves to reduce water loss and protect against harsh environmental conditions. The waxy coating, called the cuticle, prevents water from evaporating in hot, dry climates or from freezing in cold regions. It also protects the plant from pests and diseases by acting as a physical barrier. Examples include succulents in deserts and evergreen trees in cold climates, which rely on this adaptation to thrive in challenging habitats.