Columbia subject headings:
Dwellings--Energy consumption--Canada.
Dwellings--Energy consumption--United States.
Solar energy--Canada.
Solar energy--United States.
Harvard subject headings:
Princeton subject headings:
Dwellings--Energy conservation--Canada--Congresses.
Dwellings--Energy conservation--United States--Congresses.
Solar energy--Canada--Passive systems--Congresses.
Solar energy--United States--Passive systems--Congresses.