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A gradual increase in the overall Temperature of the earth’s atmosphere generally attributed to the Greenhouse Effect caused by increased levels of carbon dioxide, CFCs, and other pollutants.

The trapping of the sun’s warmth in a planet’s lower atmosphere, due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet’s surface.

The angular distance of a place north or south of the earth’s equator, or of the equator of a celestial object, usually expressed in degrees and minutes.

The angular distance of a place east or west of the Greenwich meridian, or west of the standard meridian of a celestial object, usually expressed in degrees and minutes.

A general direction in which something is developing or changing.

The Area of variation between upper and lower limits on a particular scale.

An organism whose presence, absence or abundance reflects a specific environmental condition.

Crude Oil is a naturally occurring, unrefined petroleum product composed of hydrocarbon deposits and other organic materials.

To clear the bed of (a harbour, river, or other Area of water) by scooping out mud, weeds, and rubbish with a Dredge.

An act of fishing with a Trawl net or seine.