Sustainability

Our home is partly underground—it's an ........... house.

We installed .......... on the ceiling to let in more natural light during the day.

The builders used ....... tires to create strong, eco-friendly walls.

The ...... wall in the living room looks beautiful and also helps control heat.

Concrete floors have great ....... mass and help keep the house warm at night.

A thick stone wall can act as a ........ and release warmth slowly.

This house is completely ........ and uses no public utilities.

The ............... collects water from the roof when it rains.

A ............. on the roof provides electricity from sunlight.

They decided to ....... old wood to make furniture for the new house.