They look like designs from the pages of a futurist’s notepad, but the concepts below are all finalists in the biennial public art contest held by the Land Art Generator Initiative (Lagi).

These ideas illustrate the possibility of marrying aesthetics with renewable energy and water technology and educate the public about the challenges of addressing climate change and feeding a growing population.

Santa Monica, a beach town west of Los Angeles, is the setting for this year’s competition. The theme is clean water, to acknowledge California’s fifth year of serious drought. The winners will be announced on 6 October.

Cash prizes are $15,000 for first place and $4,000 for second place. While winning doesn’t guarantee that the concept will be brought to life, Lagi works with city governments and local businesses to try and turn the more feasible projects into reality.

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Source: Guardian Environment