4 sentences

1. 请不要随意丢弃废旧电池。

   qǐng bú​yào suí​yì diū​qì fèi​jiù diàn​chí.

   Please do not discard old batteries at will.

   Source: Dong Chinese Dictionary

2. 这种纸张是由废旧报纸制成的。

   zhèi zhǒng zhǐ​zhāng shì yóu fèi​jiù bào​zhǐ zhì​chéng de.

   This paper is made from waste newspapers.

   Source: Dong Chinese Dictionary

3. 我们要养成回收废旧物品的好习惯。

   wǒ​men yào yǎng​chéng huí​shōu fèi​jiù wù​pǐn de hǎo xí​guàn.

   We should develop the good habit of recycling old and discarded items.

   Source: Dong Chinese Dictionary

4. 那座废旧的工厂已经荒废多年了。

   nà zuò fèi​jiù de gōng​chǎng yǐ​jīng huāng​fèi duō nián le.

   That old, abandoned factory has been derelict for many years.

   Source: Dong Chinese Dictionary