| http://www.w3.org/ns/prov#value | - for all commodities except agricultural and excluded commodities (primarily financial commodities but also commodities such as weather) potentially are eligible to trade on an ECM. Examples of commodities traded on ECMs are energy products, metals, chemicals, air emission allowances, paper pulp, and barge freight rates.\11\ ECMs fall somewhere between DTEFs and EBOTs on the regulatory oversight sp
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