地球的环境,指空气,构成地球周围大气的气体和水资源、生物、地理条件等。无色,无味,主要成分是氮气和氧气,还有极少量的氡、氦、氖、氩、氪、氙等稀有气体和水蒸气、二氧化碳和尘埃等。常温下的空气是无色无味的气体,液态空气则是一种易流动的浅黄色液体。一般当空气被液化时二氧化碳已经清除掉,因而液态空气的组成是20.95%氧,78.12%氮和0.93%氩,其它组分含量甚微,可以略而不计。
如果(陨石撞击地球的)力度足够大,相撞会扰乱整个地球的环境,并引发一场生态灾难。
If an impact is large enough, it can disturb the environment of the entire Earth and cause an ecological catastrophe.
科学家们把咸海描绘成地球上生态环境最差的地方。
Scientists have described the Aral sea as the site of the worst ecological disaster on earth.
其观点是,我们正在以一种超过使其可持续的额度从我们称为“地球环境银行”的账户余额中提现;我们的生活已经超出了我们的生态的承受能力。
The idea is that we are taking more out of what you might call the planet's environmental bank balance than it can sustain; we are living beyond our ecological means.
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