全球变暖或引外星人毁灭地球？

The first spaceman to land on Earth may not be as friendly as ET。

In the latest bid to get us to cut greenhouse gases, scientists have decided that eco-conscious aliens disgusted by mankind's emissions could destroy our planet in disgust。

When observed from afar, the changes in Earth's atmosphere could label us as a civilization that has grown out of control。

Aliens reaching that conclusion may then launch a pre-emptive attack to protect this perceived threat to their own way of life。

电影《ET》剧照

But that is only one possibility. Scientists are also considering other unwelcome - and far-fetched - outcomes, such as aggressive extra-terrestrials who eat or enslave us, or perhaps they are industrial types who want to improve their own technological infrastructure and so pillage ours。

Lead researcher Shawn Domagal-Goldman and his team compiled a list of hypothetical situations to help us when we come into contact with other life forms。

Their suggestions include the issuing of warnings against broadcasts that might help aliens from learning about our biological make-up。

The first part of our contact, they add, should be limited to maths until we have a better idea of the type of ETI we are dealing with。

It would be particularly important for us to limit our emissions of greenhouse gases, since atmospheric composition can be observed from other planets。

据英国《每日邮报》19日报道，来到地球的首个外星人或许不会像电影《外星人》中的主角ET一样友好。

为了敦促我们减少温室气体排放，科学家断言，热衷保护生态环境的外星人会对人类温室气体的排放感到难以容忍，并怀着厌恶之情摧毁我们的星球。

若从地球以外进行观察，地球中发生的变化可能意味着，我们的文明已经走向失控。

得出这个结论的外星人或许会先发制人袭击地球，以消除会对其生活方式构成威胁的不利因素。

但这仅是一种可能。科学家还在考虑其他一些令人难以接受的情况，比如具有侵略性的外星人会把我们当成食物与奴仆，或者外星人可能处于工业文明阶段，他们希望改善自身的技术设施并因此对我们进行掠夺。

首席研究员肖恩-多马加尔-戈德曼和他的团队收集了一系列(有关外星生命的)假说，以便在我们与其他生命形态接触时得到帮助。

科学家们的建议包括对使用广播的警告，广播可能会帮助外星人 我们的生物构成。

他们还说，在我们对外星人有更多了解之前，我们同外星人接触的第一步应该仅限于数学方面。

减少温室气体的排放对我们来说就显得尤为重要，因为其他星球(上的生物)能够观测到地球大气的组成成分