The document is about what the sky produces during different seasons and how it affects us. It discusses the characteristics of the sky in winter, summer, spring, and fall. In winter, the sky is cloudy and dark with bare trees. In summer, the sky is blue with clouds and the air is warm. In spring, the sky has blue and clouds and flowers and trees bloom with warm crisp air. In fall, the leaves on trees change color and fall off as the weather goes from warm to cool with a blue to grey sky.