l. The doldrum sides of the trade winds, called calms of Cancer and calms of Capricorn, respectively

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A substance capable of causing cancer.


That part of the earth between the Tropic of Cancer and the Arctic Circle.


The region of the earth between the Tropic of Cancer and the Tropic of Capricorn. Also called the TROPICS.


Either of the two parallels of declination (north or south), approximately 23°27' from the celestial equator, reached by the sun at its maximum declination, or the corresponding parallels on the earth. The northern of these is called the TROPIC OF CANCER and the southern, the TROPIC OF CAPRICORN. The region of the earth between these two parallels is called the TORRID ZONE, or often the TROPICS.


Chemicals that are known or suspected to cause cancer or other serious health effects, such as reproductive effects or birth defects, or adverse environmental effects. Listed hazardous air pollutants include benzene, found in gasoline; perchlorethlyene, emitted from some dry cleaning facilities; and methylene chloride, used as a solvent and paint stripper in industry; as well as dioxin, asbestos, toluene, and metals such as cadmium, mercury, harmonic vibration See harmonic motion.

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