节省(jiéshěng) economize; save
能源(néngyuán), the sources of energy
灾难性(zāinànxìng) disastrous
鼓励(gǔlì) encourage
税务(shuìwù) tax administration
优惠(yōuhuì) preferential; favourable
肮脏(āngzāng) dirty
陈旧(chénjiù) outmoded; obsolete
思维(sīwéi) ideas; thought
意味着 signify; mean; imply