Grade 7

 
dramatic sunset over a lake
Nature at Work

Revel in the beauty, mystery, and power of nature.






Austin City Hall, Austin, Texas

What is a Green Roof?

Source: How Stuff Works

Planting gardens on rooftops is an idea that is catching on. You can find green roofs in urban environments, where space is limited and it is difficult to make room for plants. Learn all about the costs and benefits of green roofs here.
















* HMH is not responsible for the content of third–party websites.