Some of the most daring responses deal with innovative ways to live with water.
Designer Justinian Khoo used his thoughts on the issue to win second place in theRedesign the Worldcompetition.
The floating city is designed for human survival and will provide care for the ocean, he says.
The proposal is made up of clusters of floating cities grouped together like pods of whales.
By moving human life to these structures, the planets landmasses can return to their natural state.
Justinian KhoosThe Whalewas just one of over 100 entries to Dezeens Rebuild the World competition.
For more entries, read more coverage of their favorite projectshere.
