The air we breathe contains vital respiratory gases and a lot more besides. The main components are nitrogen, oxygen, argon and carbon dioxide. But it also contains particulate matter that can harm us.
Facebook Messenger Web
Medical experts' testimony dismissed the defendant's claims that George Floyd died from previous drug use. The police officer who kneeled on Floyd's was charged with murder and manslaughter.
We do it all the time without giving it any thought – breathing. We inhale oxygen and exhale carbon dioxide. But air doesn't only contain the gases we need but also harmful particulate matter.
Cosmonauts are considering sealing off the affected area, but worry this would impact the overall operation of the orbital station. Russia's space agency has said it can send more oxygen to the ISS, if necessary.
Nearly 3,000 tons of ammonium nitrate pumped massive pollution into the air of Lebanon's capital last month. Some worry the post-blast cleanup is worsening the problem.
© 2021 Deutsche Welle |
Legal notice |
| Mobile version