<p>Levels of toxic Nitrogen Dioxide (NO2) air pollution have rebounded in cities around the world, Bangkok included,&nbsp;one year after initial Covid-19 lockdowns went into effect, a new <a href="https://www.greenpeace.org/static/planet4-southeastasia-stateless/2021/06/377a9664-reboundreport.pdf">report</a> from Greenpeace Southeast Asia finds.&nbsp;</p>