The process of turning green plants white due to lack of light is called chlorosis.

Here's a breakdown:

* Chlorophyll: The green pigment in plants that absorbs sunlight for photosynthesis.

* Chlorosis: A condition where plants lose their chlorophyll, causing them to turn yellow or white.

* Lack of Light: The primary cause of chlorosis in this case, as plants need sunlight to produce chlorophyll.

While chlorosis is often caused by a lack of light, it can also be caused by other factors such as nutrient deficiencies, soil pH imbalances, and diseases.