| 环境 | huan2 jing4 | ambient |
| 点 | dian3 | to hint |
| 周围 | zhou1 wei2 | environment |
| 铁矿 | tie3 kuang4 | ironstone |
| 环保 | huan2 bao3 | environmentally friendly |
| 铸铁 | zhu4 tie3 | pig iron |
| 戈尔 | ge3 er3 ge1 er3 | Al Gore (1948-), US vice-president 1993-2001 under Bill Clinton, subsequently environmental campaigner and Nobel Peace laureate |
| 好事 | hao3 shi4 hao4 shi4 | charity |
| 讽刺 | feng3 ci4 | irony |
| 生铁 | sheng1 tie3 | pig iron |
| 铁丝 | tie3 si1 | iron wire |
| 环境保护 | huan2 jing4 bao3 hu4 | environmental protection |
| 铁板 | tie3 ban3 | iron panel |