Why do some orchids have green roots?

Some orchids have green roots due to the presence of chlorophyll, allowing them to perform photosynthesis. This adaptation is particularly beneficial for epiphytic orchids, which grow on trees and may have limited access to nutrients. The green roots can capture sunlight and convert it into energy, supplementing the nutrients they absorb from the air and moisture. Additionally, these green roots help the plant thrive in environments where traditional soil-based nutrients are scarce.