2 sentences

1. 酸雨不是自然现象。

   suān​yǔ bù shì zì​rán xiàn​xiàng.

   Acid rain is not a natural phenomenon.

   Source: Tatoeba

2. 酸雨会损害森林并破坏生态平衡。

   suān​yǔ huì sǔn​hài sēn​lín bìng pò​huài shēng​tài píng​héng.

   Acid rain damages forests and upsets the ecological balance.

   Source: Dong Chinese Dictionary