So it has to be a man-made disease, down to pollution and changes to our diet and lifestyle" caused particular consternation.
因此，癌症是一种人造疾病，其原因是环境污染以及我们的饮食习惯和生活方式发生了变化。
2
Light pollution is a problem that has been accompanying man ever since he started his first fire some 15, 000 years ago, and technology has only made it worse.
Light pollution is a problem that has been accompanying man ever since he started his first fire some 15,000 years ago, and technology has only made it worse.