Delhi, the capital of India, often ranks as one of the most polluted cities in the world. Huge numbers of vehicles on the road and crop-burning from nearby farmland all add to the high air pollution levels – which typically peak during the Indian Diwali ‘new year’ period. Find out all the latest news about air pollution in Delhi.
NO2 is an important pollutant to track because exposure to high concentrations can lead to respiratory problems in humans. So did India’s nitrogen dioxide levels improve in 2021? How did COVID-19 lockdown affect NO2 levels in India? Why NO₂ is Dangerous NO₂ can transform into ground-level ozone, which poses a … Read more
Air pollution is one of the biggest killers in Delhi. So, it would make sense to wonder whether exercising on a polluted day in Delhi does more harm than good. Below is a picture of people exercising in Delhi with PM2.5 air pollution levels at 150 micrograms or an AQI … Read more
Delhi is one of the most polluted cities in the world. PM2.5 pollution levels often reach more than 10 times the World Health Organization’s annual limit. So what are the main sources of Delhi’s air pollution? Smart Air dove into the data to get to the root of where Delhi’s … Read more
Air pollution kills hundreds of people in India every day. Due pollution being a “silent” killer, most do not even grasp how much pollution affects our health. As per WHO research over 92% of people in the world is breathing unsafe air with high air pollution levels. Statistics regarding deaths … Read more
How was Delhi’s air quality in 2020? Did Delhi’s air quality improve in 2020 compared to recent years? For the previous three years, Delhi has seen little improvement in air quality. Air pollution levels have hovered around 10x the World Health Organization’s (WHO) recommended limit for PM2.5 levels. Smart Air … Read more
Did India’s air quality improve in 2020? How did COVID-19 affect air quality in India? Smart Air analyzed 2020 India air pollution data for five of India’s major cities: Delhi, Mumbai, Kolkata, Chennai, and Hyderabad. WATCH: Fixing India’s Air Pollution Problem 2020 India Air Quality Report Of the five major … Read more
Delhi often makes headlines as one of the most polluted cities in the world, but has the coronavirus lockdown starting March 25th dramatically cut pollution in the capital? News outlets have reported reductions in pollution, but reports of reductions in Beijing were later disproven by data on the ground. A … Read more
Can a simple fan and filter really make air purifiers that can clean large offices? Seven years ago, Smart Air started when PhD student Thomas strapped together a DIY air purifier to survive a polluted Beijing winter. Founder Thomas Talhelm‘s first DIY air purifier Thomas published test data on … Read more
When Delhi’s air pollution spikes, netizens in the nation’s capital often bring up the solution of planting trees. For instance, this user on the question-answer site Quora asks “how many trees does Delhi need to combat its air pollution problem?” However, environmental research suggests that planting trees are an incredibly … Read more
The Delhi government and Delhi Chief minister Arvind Kejriwal announced Delhi’s PM2.5 air pollution was down 25% in 2016-2018 compared to 2012-2014. Yet there is doubt. Thewire.in, for one, expressed skepticism about this claim. As data-driven nerds, we wanted to let the numbers answer this question. So we dug … Read more
