LA's Metropolitan Water District says winter may have been wet, but the future is dry at annual Green Expo

The state of California may have emerged from a drought. But the Metropolitan Water District is still promoting the message that we live with a limited water supply. That's the theme of its annual Spring Green Expo Wednesday in Los Angeles.

This is the fourth year that Metropolitan has sponsored the event at its downtown L.A. headquarters near Union Station. Businesses, public agencies and students will present exhibits on the latest in water sustainability, urban landscaping, gardening, green housing design and solar power.

These displays will emphasize water management in landscaping, the single biggest use for most households.

The event also features seminars on the hottest water topics. The Green Gardens Group's Pamela Berstler will talk about rainwater harvesting.

Bart O'Brien from the Rancho Santa Ana Botanic Garden will run a seminar on landscaping alternatives to the California lawn. A third talk will present strategies and tactics for urban vegetable farming in small spaces.

A wet winter helped Metropolitan to lift restrictions on water deliveries for cities and agencies that are its members. But water district leaders say a warming climate is already shrinking supplies from the Colorado River.

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