B. Keywords.

environmentally-sustainable, dream house, environmentally beneficial, eco-conscious.
Vocabulary.

well-lit, biodegradable, nontoxic, incorporate, thermal, galvanized metal, volatile, shower head, Boulder.
B1. You're going to hear some extracts taken from a news report on eco-conscious construction. Listen carefully and decide what is the noun phrase for each of the following, write in the blanks with words you hear.
1. Architect Jim Logan is building his environmentally-sustainable dream house at the site of a former commune, a few miles north of Boulder.
2. As you drive onto the small farm property, you're immediately struck by a series of large south-facing windows.
3. Walk through the well-lit kitchen, and you'll see that even the north side of the building has a passive solar component.
4. In all facets of construction, Logan is emphasizing both biodegradable building products and nontoxic materials. He's using milk-based paint, for example.
5. In many cases, many environmentally-beneficial solutions pay for themselves in as little as 6 or 7 or 8 months.