N95 Masks vs. Surgical Masks: Which Is Better at Preventing The Coronavirus?

Scientists have actually randomized people to wear N95 or regular surgical masks, then tracked how many people got infected with colds and flus similar to the coronavirus. This data can tell us whether N95 or surgical masks are more effective at preventing transmission of viruses. The results surprised me. Coronavirus & Mask Livestream Wondering whether […]

Read More »


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 Delhi’s […]

Read More »