Clean Air Data & Blog

How many trees need to be planted to solve Delhi’s air pollution?

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 inefficient way to reduce air […]

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Bike Pollution Mask India

Did Delhi’s Air Pollution Drop 25% in 2019? What The Data Says

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 into the Delhi PM2.5 data […]

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Do kid's air pollution masks really work on children

How effective are kid’s masks at filtering air pollution?

As cities like Delhi, Beijing and Manila face toxic levels of air pollution, people are rushing to find effective pollution masks, particularly for children. But there’s a problem. Children’s faces are different from adults’. Add to that, children are constantly growing, meaning that the mask that fit last year might not fit this year. Children’s […]

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