In this process a piece of tissue is cut from a healthy plant and grown in a sterile environment into several plantlets that root in pasteurized soil before being transferred to the field.

FORBES: Millions Served

Metagenomics takes another approach, basically putting an entire environment--the water in an ocean, the soil in a forest or the insides of an animal--into a DNA sequencer.

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The different programmes are specifically created for the local communities in which they are located, in thematic fields such as "forest", "culture and environment", "local community and environment", "tourism and environment", "biodiversity", "soil" etc.

UNESCO: Education For Sustainable Development - Cyprus

Once emitted, it persists in the environment for a long time - circulating through air, water, soil and living organisms - and can be dispersed over vast distances.

BBC: Nations agree on legally binding mercury rules

While it helps the environment by preventing erosion, no-till farming keeps fertilizer in the upper soil.

WSJ: Report predicts ever-bigger Lake Erie algae blooms

There he found one of the poorest populations on earth, and an environment quickly degrading as hungry farmers tried desperately to cultivate rice in the eroding soil.

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Those very herbicide-resistant plants, now grown on more than 220 million acres annually worldwide, have spurred the adoption of more environment-friendly herbicides and agricultural practices--changes that have markedly reduced soil erosion, the runoff of agricultural chemicals and carbon dioxide emissions, and increased yields.

FORBES: Magazine Article

They will use a bacterial agent that occurs naturally in soil and is authorised for the operation by Natural England, the government's advisor on the natural environment.

BBC: Toxic caterpillars to be targeted by helicopter