U6 1英语（147）

WITHIN A PLANT

It's 7:15 PM. Here comes Worker No. 55 dressed in a green uniform, ready to begin his shift at the factory.

He operates in Workshop 1001 located within the Leaf section of the plant. Each workshop houses between 20 to 100 workers. During daylight hours, they absorb sunlight and CO2. Meanwhile, workers from the Root system deliver water upward through the Stem. This water travels up to the Leaf, where workers use it along with CO2 and sunlight.

What's their main product? Most importantly, they produce sugar, crucial for the plant's growth. Another vital output is oxygen, though plants themselves require very little of it. However, for animals and humans, oxygen is essential for breathing.

These dedicated workers toil diligently. As darkness approaches, they will rest.

Earth hosts millions of plants, offering more than just food and oxygen. Without them, the natural world would be drastically altered!