But is the data anonymous? Or can it be traced to individual users?

I go road cycling a lot. That burns more than 600 calories an hour. Just one 3 hour ride per week offsets almost as much calories as eating in one day does.

But will it mess up my pillow if I don’t manage to remove it before bedtime?

The earth does not care much about climate change, nor about humans. Nature will bounce back eventually. It always did.

Bringing kids into this world, who are educated and adapted will help humanity, not the earth.