"Air pollution is one of the biggest environmental threats to human health, alongside climate change. New guidelines provide clear evidence of the damage air pollution inflicts on human health, at even lower concentrations than previously understood." "Global assessments of ambient air pollution alone...
Source: who.int
"A spectacular sky is visible through this banded airglow, with the central band of our Milky Way Galaxy running up the image center, and M31, the Andromeda Galaxy, visible near the top left."
Source: nasa.gov
"It was predicted in March 2020 that in response to covid-19 a broad lockdown, as opposed to a focus on shielding the most vulnerable members of society, would reduce immediate demand for ICU beds at the cost of more deaths long term. The optimal strategy for saving lives in a covid-19 epidemic is different...
Source: bmj.com