eco-roof
nounUK /ˈiːkəʊ ruːf/
US /ˈiːkoʊ ruːf/
A roof that has plants or grass growing on it to help the Earth.
The new library has an eco-roof covered with green grass and flowers.
OTHER MEANINGS
2. A roof built with materials or features that save energy and help the environment.
They added solar panels to make it a true eco-roof.
3. A roof designed to collect rainwater for reuse.
The eco-roof channels rain into a tank for the garden.
4. A rooftop garden used to grow food or support wildlife.
Bees and butterflies visit the eco-roof on top of the school.