Global Footprint Network said that humans now use 1.6 Earths worth of crops, forest, livestock, and other resources every year.By the 2030s, we will be using more than two Earths worth of resouces every year.

专家老师，句子里的红色字体Earth应该用所有格才是吧？也就是在Earths后加一’。

请专家老师指导，十分感谢。