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This is a partial list of awareness ribbons. The meaning behind an awareness ribbon depends on its colors and pattern. Since many advocacy groups have adopted ribbons as symbols of support or awareness, ribbons, particularly those of a single color, some colors may refer to more than one cause. Some causes may be represented by more than one ...
Palladium is also used in electronics, dentistry, medicine, hydrogen purification, chemical applications, groundwater treatment, and jewelry. Palladium is a key component of fuel cells, in which hydrogen and oxygen react to produce electricity, heat, and water. Ore deposits of palladium and other PGMs are rare.
Many metals, particularly heavy metals are toxic, but some are essential, and some, such as bismuth, have a low toxicity. Metals in an oxidation state abnormal to the body may also become toxic: chromium(III) is an essential trace element, but chromium(VI) is a carcinogen. Only soluble metal-containing compounds are toxic.
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In Israel, a yellow ribbon became a symbol of solidarity with the Israeli hostage victims during the Gaza war. Some protesters wore the yellow ribbon at the Bring Them Home Now protests. Of the uses of ribbons to draw awareness to health issues, perhaps the best-known is the pink ribbon for support of those with breast cancer.
It is also part of the Canadian WHMIS home symbols placed on containers to warn that the contents are poisonous. In the United States, due to concerns that the skull-and-crossbones symbol's association with pirates might encourage children to play with toxic materials, the Mr. Yuk symbol is also used to denote poison.
An "autism awareness" ribbon, featuring red, blue, and yellow jigsaw pieces Jigsaw puzzle pieces were first used as a symbol for autism in 1963 by the United Kingdom's National Autistic Society . [ 32 ]