Read the text again and for each gap (1-7)
choose from the sentences A-H the one which
best fits each gap. There is one extra sentence.
A The idea isn't without its problems though.
B However, that doesn't mean we won't be able
to do it soon.
C These are long gone.
D We are already using too much of our farmland.
E "With about 160 of these buildings, you could
be feeding all of New York," he says.
F The idea is actually very simple.
G They will be powered by solar and wind energy.
H On one floor there will be lettuce, on the next
carrots, and so on.​