Smoking is harmful to your health.（吸烟对你的健康有害。）

Polluted air is harmful to people living in big cities.（被污染的空气对生活在大城市的人们有害。）

Staying up late for a long time is harmful to our body.（长期熬夜对我们的身体有害。）

Some chemicals in the water are harmful to aquatic life.（水中的一些化学物质对水生生物有害。）

Excessive exposure to the sun's rays can be harmful to the skin.（过度暴露在阳光下对皮肤有害。）

Eating too much junk food is harmful to children's growth.（吃太多垃圾食品对孩子的成长有害。）

The noise from the construction site is harmful to our hearing.（建筑工地的噪音对我们的听力有害。）

These pesticides are harmful to beneficial insects.（这些杀虫剂对益虫有害。）

Playing video games for hours continuously is harmful to your eyesight.（连续玩几个小时电子游戏对你的视力有害。）

Stress can be harmful if not managed properly.（如果处理不当，压力会有害。）

Drinking contaminated water is extremely harmful to one's well - being.（饮用受污染的水对人的健康极其有害。）

The fumes from factories are harmful to the environment.（工厂排放的废气对环境有害。）

Negative thoughts can be harmful to your mental state.（消极的想法对你的精神状态有害。）

Using mobile phones while driving is harmful and dangerous.（开车时使用手机既有害又危险。）

Some wild mushrooms are harmful if eaten by mistake.（有些野生蘑菇误食会有害。）

Lack of exercise is harmful to your physical fitness.（缺乏运动对你的身体健康有害。）

Chemical fertilizers in large amounts can be harmful to the soil.（大量使用化肥对土壤有害。）

Second - hand smoke is also harmful to non - smokers.（二手烟对不吸烟者也有害。）

Overusing antibiotics can be harmful to the body's immune system.（过度使用抗生素对人体免疫系统有害。）

The sharp edges on that broken glass are harmful and could cut someone.（那块碎玻璃的锋利边缘很危险，可能会割伤人。

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