
United Nations @UN
1/3 of all countries have no legally mandated outdoor air quality standards. Where such laws do exist, standards vary widely & often don't align with @WHO guidelines. More on the urgent need to #BeatAirPollution from @UNEP ahead of #WorldCleanAirDay. ⬇️ https://t.co/5vyJ6c7elt — PolitiTweet.org