woman wearing protective mask looking at city road

adult air atmosphere avoiding away bacteria bad care change city climate co2 contagion contagious contaminated contamination coronavirus cov covid19 danger disease eco ecology emission environment environmental epidemic epidemy female fumes girl hazard healhcare health healthcare hypochondriac illness infectious looking mask outbreak outside ozone pandemic people person pm2 polluted pollution precaution preventing prevention problem protecting protection protective respiratory safety sickness smog street teen toxic traffic urban viral virus wearing woman young