这位德国人称，改用节能灯泡每年可减少约2500万吨二氧化碳的排放。

The German said the switch to energy saving bulbs could save about 25 million tonnes of CO2 emissions per year.

youdao

这位德国人称，改用节能灯泡每年可减少约2500万吨二氧化碳的排放。

The German said the switch to energy saving bulbs could save about 25 million tonnes of CO2 emissions per year.

youdao