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The threat of citrus greening disease in California has prompted scientists to freeze cuttings to help preserve the state's many varieties of citrus.

To Protect Fruit Crops, Scientists Are Putting Them Into A Deep Freeze

In an effort to save irreplaceable varieties from disease and other threats, plant cuttings are being "cryopreserved" — plunged into liquid nitrogen for later revival.

Children walk through a rice field outside the town of Kelilalina in eastern Madagascar. Rice is the dominant food and the dominant crop on the Indian Ocean island, but changing weather patterns are disrupting production in some parts of the country.

Erratic Weather Threatens Livelihood Of Rice Farmers In Madagascar

Climate change is complicating the lives of subsistence rice farmers in Madagascar. For years, the wet and dry seasons arrived predictably. No more. To survive, farmers are looking to diversify.

Durango's Economic Development Minister Juan Francisco Guttiérez speaks to a group of Mexicans living in Las Vegas about the drought in his home state.

Mexican Officials Come North Asking For Drought Aid

Officials from the northern state of Durango are touring U.S. cities to encourage Mexican immigrant associations to raise money, send food donations, and are reaching out to local companies for corporate charity.

A woman draws water from a pool on Sunday after officials in Chile's capital city, Santiago, cut off the water supply.

PHOTOS: Wild Weather In Chile Leaves Millions Without Access To Running Water

Authorities cut off service to the capital, Santiago, following torrential rains that contaminated the water supply. People are now scrambling to find alternative sources of drinking water.

Oh, Nuts! Why California's Pistachio Trees Are Shooting Blanks

This year, as many as 50 percent of the pistachios harvested in California could be hollow inside. Blame it on drought, heat and weather changes that are messing with male trees' virility.

Graeme McDowell, of Northern Ireland, watches his tee shot on the sixth hole during the first round of the U.S. Open golf tournament at Chambers Bay. The brown grass may seem unusual to some American golf fans.

Here's Why The Grass Isn't Greener At This Year's U.S. Open

The Chambers Bay Golf Course in Washington State is almost all drought-resistant fescue grass, which is supposed to be brown in hot months.

The San Diego County Water Authority has been upgrading its existing water storage facilities in an effort to decrease reliance on the Metropolitan Water Authority. This photo shows construction at the San Vicente Dam to remove the right crest of the dam to increase the size of the reservoir, November 2009.

25 Years Of Water Feuding In San Diego Explained

They've been at odds for years, but the discord between the San Diego County Water Authority and the Metropolitan Water District of Southern California seems about to boil over.

Atmospheric rivers are sinews of moisture from the tropics. The one pictured here appeared over the Northern Pacific on Jan. 3.

New Research Shows How 'Atmospheric Rivers' Wreak Havoc Around The Globe

The idea of plumes of moisture curling above our heads might seem beautiful, but new research shows atmospheric rivers to be among the most damaging of weather systems.

New Research Shows How 'Atmospheric Rivers' Wreak Havoc Around The Globe

The idea of plumes of moisture curling above our heads might seem beautiful, but new research shows atmospheric rivers to be among the most damaging of weather systems.

Southern California To Get Less Water In Summer

The Metropolitan Water District, which supplies water to the region, voted to slash water deliveries by 15 percent as California grapples with a fourth year of drought.

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