Eye irritation, gritty or scratchy feeling in eyes are common symptoms of dry eyes.
What does ESA data tell us about lockdown light pollution?Īccording to new satellite data from the European Space Agency (ESA), one of the many impacts of the COVID-19 outbreak has been a drop in air pollution.ĮSA’s Copernicus Sentinel-5P satellite has been mapping air pollution across Europe and China, and the data shows a reduction in concentrations of nitrogen dioxide – such as that released by industry, vehicles and air travel – that coincide with lockdown measures imposed by governments across the world.ĮSA satellite images below represent concentrations of nitrogen dioxide from 14 to 25 March 2020, compared to average monthly concentrations from 2019.What does it mean to have gritty feeling in eyes? The sensation can be described as having sand in your eyes.
This, he argues, is a clear waste of energy and resources, as well as being a source of frustration for many amateur astronomers. Given that outdoor activity decreased by up to 90% during lockdown, Bustamante-Calabria concludes that the late-night emissions of the city are dominated by permanent lighting that doesn’t respond to the actual behaviour of its citizens. VIIRS data doesn’t record any significant difference in the light emission of cities before and during lockdown. Most of these lights are turned off by the early hours, however, and so are missed by the satellite imagery. Nowadays, these are usually metal halide or LED lamps that produce a blue-white light, rather than the yellowy colour of sodium lamps (for more on this, read our guide to the best lighting to minimise light pollution). At times, lockdown has meant a dramatic decrease in rush hour traffic, leading to fewer headlights in towns at cities during darker months.
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