whether the US will withdraw from the landmark Paris Agreement on climate change.
In some cases, the images — mostly from NASA, unless otherwise noted — were taken as far as 50 years apart;
Photographs from the 1940s to 2000s show the drastic effect of climate change on our planet's glaciers
Mount Elgon National Park in Uganda in 1973 compared with 2005.
The deforestation of a forest in Salta, Argentina, is starkly visible in this pair of photos from 1972 and 2009.
Deforestation is also prevalent in the South American Atlantic Forest in Paraguay — here's how it looked in 1973 versus 2008.