为一篇英文文章生成中文翻译。
下面是一段英文文章：
Climate change is one of the greatest challenges of our time. The scientific evidence is clear: climate change is real, it is caused by human activity, and it will have severe and lasting impacts on human civilization if we do not take immediate and decisive action to curb greenhouse gas emissions.
气候变化是我们时代最大的挑战之一。科学证据表明：气候变化是真实存在的，它是由人类活动引起的，如果我们不立即采取果断行动控制温室气体排放，它将对人类文明产生严重和持久的影响。