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larvae: the early form of most invertebrates, amphibians and fish, that is unlike its adult form and must metamorphose before assuming adult characteristics.

latitude: a north-south measurement of position on Earth, defined by the angle measured from a horizontal plane located at Earth's center that is perpendicular to the polar axis and measured in degrees, minutes and seconds. Measurements range from equator (0 degrees) to 90 degrees north and south from this point. (A line connecting all places on the same latitude is called a parallel.)

leis: necklaces made of fragrant flowers strung together and traditionally used to say hello, goodbye, thanks or to celebrate nearly anything in Hawai'i.

life cycle analysis: a comprehensive examination of the environmental and economic effects of a product at every stage of its existence, from production to disposal and beyond. Also known as cradle-to-grave assessment.

limiting factor: the least abundant component of a system – usually the one component to which the application of a given amount of effort will pay the greatest returns.

livestock: farm animals, such as beef cattle, dairy cows, sheep, hogs, chickens, goats and turkeys.

London plane tree: trees from the genus Platanus in the order Hamamelidales.

longitude: an east-west measurement of position on Earth, measured from a vertical plane running through the polar axis and the prime meridian, recorded in degrees, minutes and seconds ranging from 0 degrees at the prime meridian to 180 degrees west and east. (A line connecting all places of the same longitude is called a meridian.)

longlines: fishing tackle involving a horizontal line fit with hooks and held by floats.

Lyme disease: a multi-stage bacterial infection caused by the spirochete Borrelia burgdorferi, a spiral shaped bacterium that is most commonly transmitted by a tick bite.

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