本周早些时候，包括美国铝业、卡特彼勒公司和杜邦公司等10家企业联合要求国会尽快建立温室气体配额交易制。

Earlier this week ten companies, including Alcoa, Caterpillar and DuPont, called for Congress to set up a cap-and-trade system for greenhouse gases as quickly as possible.

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美国铝业公司还表示，预计今年生产需求增加12%，包括销售给汽车生产商的铝产品增加11%。

The huge aluminum maker also said it expects demand for its products to jump 12 percent this year, including gains of up to 11 percent in sales to automakers.

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