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