餐厅环保的英语表达可以有以下几种方式：

环境友好型（eco-friendly）

例如：The restaurant is eco-friendly, using locally sourced ingredients and renewable energy sources.

环保的（environmentally friendly）

例如：The restaurant practices environmentally friendly practices, such as composting and reducing food waste.

绿色（green）

例如：The green restaurant focuses on sustainability and reducing its carbon footprint.

可持续的（sustainable）

例如：The restaurant is committed to sustainable practices to protect the environment.

减少浪费（waste reduction）

例如：The restaurant implements measures to reduce food waste and promote recycling.

使用可再生能源（using renewable energy）

例如：The restaurant uses solar panels to generate clean energy.

本地采购（local sourcing）

例如：The restaurant sources its ingredients from local farmers to reduce transportation emissions.

这些表达方式可以根据具体的语境和需要选择合适的词汇来描述餐厅在环保方面的努力和成就。