If they hit the Earth they would have global effects.

如果它们撞击地球将会产生全球性的影响。

In 50,000 years earth will enter into another glacial period regardless of current global warming effects.

不管目前的全球变暖效应如何，五万年后地球将进入另一个冰川期。

The biggest uncertainty about the global effects of a hot American economy is the reaction of the FED.

美国经济过热对全球影响最大的不确定因素是美联储的反应。

El Nino, a natural warming of Pacific temperatures, had global effects last year.

厄尔尼诺现象是太平洋温度的自然变暖，去年对全球产生了影响。

As accelerated warming in the Arctic amplifies the global warming effect, temperature spikes and heat waves have worsened.

随着北极加速变暖加剧了全球变暖效应，温度峰值和热浪已经恶化。