2. Richie's house is not as comfortable as George and Marlene's.
George and Marklene's house is more comfortable than Richie's.
3. Detroit is not as sunny as Cancun.
Cancun is more sunny than Detroit.
4. Marlene's house is not as interesting as Richie's island.
Richie's island is more interesting than Marlene's house.
5. Cancun is not as noisy as Detroit.
Detroit is noisier than Cancun.
6. Villages are not as polluted as big cities.
Big cities are more polluted than villages.