帮我翻译几个句子，谢啦。汉译英。

现在，社会上存在着各种各样的问题。其中最重要的问题之一就是空气污染。它成为21世纪，最能损害人类身体健康的问题之一。每年因空气污染而患各种疾病的人数不断增加。

Nowadays, there exist various problems. One of the most important problems is air pollution. It is the 21st century, the most harmful to human health problems. Each year from air pollution, the number of people suffering from various diseases on the rise.

Nowadays, there exist various problems. One of the most important problems is air pollution. It is the most harmful problem to human being's health in 21th century. Each year, the number of people suffering from various diseases based on the air pollution is on the rise. 希望对你有所帮助！