![]() ![]() This starts with green, which indicates very good quality air. To show the differences in air pollution, a colored 7-level scale (Airly CAQI) operates on our platform. In Airly, when providing the CAQI index, we consider PM10 and PM2.5 dust. It is a relative measure of the amount of air pollution. Take extra caution when on the road or avoid driving if possible. ![]() When this happens, visibilities frequently drop to one-quarter of a mile or less. The air quality index used in Europe, CAQI, has five ranges, with the values presented on a scale from 0 (very low) to >100 (very high). A Dense Fog Advisory is issued by your local National Weather Service office when widespread dense fog develops. The platform updates its data on average every 3 minutes, so the measurements shown are the rolling average of the last full hour. In our monitoring system, we use the hourly index, which describes the current air quality based on the average of all measurements from the last hour. In European cities, a simpler presentation of air quality data is accomplished using various different indices, each converting their measurements into one easily understood number. It is right next to the air quality forecast graph. The percentage factor is visible in the side panel after selecting the measuring station on the map. The accuracy value is calculated for each Airly station, based on measurement data and forecasts collected from the last 14 days. We monitor the accuracy of our forecast on an ongoing basis and provide this information in our applications. In our opinion, this proves the high effectiveness of our predictive model. However, the difference between the expected and actual air quality is rarely big enough to make the forecast completely inaccurate. ![]() For example, we may predict very good air, but in reality, it will be "just" good. Similarly, when our forecast predicts a very high level of pollution, almost certainly smog awaits us - put on your masks and preferably do not leave the house! In the remaining 5% of cases, our model may be wrong, but usually, it is off by only 1 CAQI level. In other words, when our model predicts very good air, there is a 95% chance it will be so. This means that when forecasting air quality, in 95 cases out of 100, the absolute error of our prediction (relative to later-measured values) is not higher than 25 on the CAQI scale, i.e. In some cases, the nature of the item means that it is non-returnable, for example, due to hygiene/health and personal care/wellness/consumable nature of the product.According to our calculations, the accuracy of our air quality forecast is over 95%. Office Products and Wireless Returns Policy New electronic items fulfilled by Amazon AU can be returned for change of mind, for a replacement or a full refund of the purchase cost of the item within 30 days of receipt of delivery.For information about returning faulty electronics please see Returning Faulty Items. Please see our Amazon Global Store Returns policy and Refunds policy for more information about returning Amazon Global Store items.Ĭamera, Electronics and PC Returns Policy London Fog Weather or Not Faux Ostrich / Leather Handbag Purse. Please see About Marketplace Returns & Refunds for details on Seller returns policies. To return faulty items see our Returning Faulty Items policy.įor items ordered on from a seller that fulfils and ships its own inventory (also called a third party seller), any returns will be in accordance with the returns policy set by that seller (not the Amazon AU returns policies). This change of mind return policy is in addition to, and does not affect your rights under the Australian Consumer Law including any rights you may have in respect of faulty items. Unless otherwise stated, original shipping fees for change of mind returns are not refunded. Please Contact Us and see About Items That Can’t Be Returned. In some circumstances, these items may be eligible for a refund or a replacement (for example, if you receive the wrong item due to an Amazon AU error or if the item is faulty). In some cases, the nature of the item means that it is non-returnable, for example, due to hygiene/health and personal care/wellness/consumable nature of the product. You can return most new, unopened items fulfilled by Amazon AU within 30 days of receipt of delivery for a replacement or full refund of the price you paid for the item if you change your mind - see About Replacements and About Refunds. ![]()
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