Andy Saunders writes:

Left – Apollo 17, 1972 Right – Artemis II, 2026

Two photographs taken by one of us, of all of us, over half a century apart.

What’s changed? pic.twitter.com/it1Ab2GVdz (https://t.co/it1Ab2GVdz) — Andy Saunders – Apollo Remastered (@AndySaunders_1) April 3, 2026 (https://twitter.com/AndySaunders_1/status/2040074040656699629?ref_src=twsrc%5Etfw)

A couple of things come to mind. The planet on the right contains, on average, around 70% fewer animals than the planet on the left.

The atmosphere of the planet on the right also contains around 100 ppm, or 30%, more CO2 than the planet on the left.

It seems to me that in many ways, humankind as a whole has not protected our Blue Marble (https://en.wikipedia.org/wiki/The_Blue_Marble) very well in the 50-odd years between these images. Perhaps the next generation can do better.