The natural environment is becoming increasingly worse.

来源：这是一个广泛使用的表达方式，源自于对全球环境状况的担忧。

例句：

The air quapty in cities is becoming worse and worse due to increased pollution.
城市空气质量因污染日益加剧而越来越糟糕。

The natural environment is under threat from the impact of human activities.
自然环境受到人类活动的影响而处于危险状态。

The loss of biodiversity is a clear indication that the natural environment is deteriorating.
生物多样性的丧失明显表明自然环境正在恶化。