替代使用SOAP选项，避免错误。

Use SOAP option instead to avoid errors.

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因此，使用替代燃料和提高能源效率既是生态需要，也是技术挑战。

Using alternative fuels and improving energy efficiency is thus both an ecological necessity and a technological challenge.

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一些专家认为，打印机可以使用大量的可再生能源，比如用草来替代常见的成分。

Some experts believe printers could use plentiful renewable sources like grass to replace the familiar ingredients.

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There's some alternatives that are used now as well.

现在还有一些替代产品也在使用。

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