The Zero Footprint Calculator is designed for kids to determine the kind of impact their actions are having on the environment. It’s very well done, and accessible to high-beginning and beyond English Language Learners.
I’ve placed the link on my Geography page on the bottom of the Europe section.
I know that might seem an odd location for it. But the Geography book I use, for some reason, talks about the environment in their European unit. Ordinarily, I try to use and follow textbooks minimally in my classes. However, I’ve got to say the one we use, called World Views, is a very well-designed book for English Language Learners.