Air quality today A short citizen science experiment carried out on the way to the conference this morning 1 Using the air quality route planner today Along Seven Sisters Road? 2 Or through the park? But does it really make a difference? 3 The results 4 By walking along the road, Ben was exposed to four times more diesel particulate (black carbon) than Andrew, who walked through the park. The two routes were almost the same distance and Andrew could walk faster because there were no road junctions and plenty of space. Pollution levels along quiet residential streets leading to the venue were similar to those in the park. Had the experiment been conducted during rush hour and with less windy conditions, the difference would have been much greater. 5