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London cleaned up its air pollution. Delhi can too.
Admit one · Environmental

London cleaned up its air pollution. Delhi can too.

Opened Runtime2 min Written byDavid B
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London has long been known for its smog, and in Victorian times, the air pollution was so toxic it rivaled that of some of the most polluted cities in Asia today such as Delhi, Beijing and Jakarta. But how did this change take place? Through advances in technology, cleaner energy sources and a holistic approach to tackling air pollution, London’s air is now vastly cleaner than it once was.

The story of London’s dramatic improvement when it comes to air quality began in the 1850s when England passed its first public health act. This act required factories to move out of cities and relocate to rural areas where they would have more space to emit smoke from their chimneys without impacting local citizens. Along with this came an increase in the use of steam trains rather than coal-powered locomotives which reduced the amount of polluted smoke released into the atmosphere.

By the end of WWI, London had also become a major producer of electricity using cleaner methods such as hydroelectric power generated by dams on nearby rivers. Over time, other clean energy sources were adopted such as solar panels and wind turbines which further helped reduce overall air pollution levels across England’s capital city.

Today London is home to one of Europe’s most extensive networks of electric buses which run through many parts of the city, further reducing emissions from public transport vehicles even further. This has been accompanied by a widespread switch from petrol and diesel cars to hybrid or fully electric vehicles over recent years making it easier for Londoners to get around without adding any additional pollutants into their air supply.

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#1 Best Overall
Amazon Smart Air Quality Monitor, Detects temperature, humidity, carbon monoxide, PM2.5 and VOCs, Get notifications when air quality drops, Works with Alexa
  • Know your air – An Alexa air quality monitor that makes it easy to understand what’s in your indoor air.
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Thanks to these measures along with continued awareness campaigns about reducing emissions from private cars and other sources, London’s smog is no longer an issue faced by those living in the city today. To learn more about this incredible transformation, viewers can watch ‘Smog: A Clean Air Story’ – a documentary about how England’s capital managed this incredible feat over time. It offers Singaporean viewers insights into how their own cities could benefit from similar measures when striving for clean air solutions within their own urban environments!

Best Value
Airthings 2960 View Plus - Battery Powered Radon & Air Quality Monitor (PM, CO2, VOC, Humidity, Temp, Pressure)
  • ALWAYS-ON AIR QUALITY SENSORS: WiFi connected indoor air quality monitor measuring radon gas, PM2.5 (air pollution detector), carbon dioxide (CO2), VOCs (airborne such as kitchen gases, fumes and cleaning products), humidity, temperature, and air pressure. The monitor requires the Airthings app to function. Operating Temperature 4 to 40°C / 39 to 104°F.Sensor type: Electrochemical
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LifeBasis Air Quality Monitor Indoor, 11-in-1 Air Quality Detector
  • MULTIFUNCTION MONITORING: This indoor air quality monitor provides real-time monitoring of 11 crucial indexes including AQI, CO2, PM1.0, PM2.5, PM10, Particles, HCHO, TVOC, temperature and humidity, dual alert system-visual and audible. Life Basis air quality monitor keeps you informed of current air quality levels at all times to guarantee the breath quality of your family
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Rank #3
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GoveeLife Smart Air Quality Monitor with PM2.5 H5106, LED Display Wired
  • High Accuracy & Fast Refresh Data: With this smart sensor, the PM2.5 accuracy is ±15 µg/m³ while temperature and humidity accuracies are ±0.54°F and ±3%RH.The two-second correction data feature shows the latest changes in PM2.5, temperature, and humidity.Keep sensor clear for accurate detection.
  • Multifunctional Air Quality Detector: The GoveeLife Air Quality Monitor conveniently measures 3 important indexes for indoor air quality, including PM2.5, temperature, and humidity.
  • Switchable Display: Press the top button for the clock & PM2.5 display. Long press for 2 seconds to switch to bright screen mode & night mode. The LED indicator displays 4 levels of ambient air quality. 2.4G Wi-Fi is required to display the time.
  • Connect with GoveeHome Appliances: Set your target air quality and link with your other GoveeHome smart appliances. GoveeLife air purifiers, humidifiers, and space heaters will turn on and off automatically when the indoor air quality changes.
  • H5106 needs to be connected to a power source and supports GoveeLife devices: Smart Air Purifiers - H7126, H7120, H7124, H712C, H7122, H7123; Humidifiers - H7140; Fans - H7100, H7102
Rank #2
16 in 1 Air Quality Monitor Indoor 7" High-Precision Real-Time CO2 Monitor
  • 【16-in-1 Air Quality Monitor Indoor】Experience the ultimate indoor air quality monitoring with our 16-in-1 Air Quality Monitor, offering real-time detection of 9 key parameters including CO2, PM2.5, PM1.0, PM10, HCHO, TVOC, Temperature, Humidity, AQI, and Time. With 7 distinct AQI alert buzzers, this air quality tester ensures your family breathes with ease.(*Note: "16-in-1" refers to the combination of 9 key detectable parameters and 7 types of AQI alert buzzers.)
  • 【Crystal Clear 7-inch Large Display】Enjoy a 7-inch LED display for sharp, clear air quality readings. Provides an instant, comprehensive view of your indoor air without navigating through menus, with three brightness settings for any lighting condition
  • 【External High-Precision Sensors with 0.001 Accuracy】Equipped with advanced external high-precision sensors, this device delivers unmatched accuracy (0.001 units) by directly sampling the air. Its innovative multi-sensor array and enhanced airflow design detect even the slightest environmental changes, allowing for instant response and optimal safety. (*Note: Avoid touching the sensors or exposing them to perfumes/strong odors to maintain accuracy.)
  • 【Real-Time AQI Alert Buzzers】Our air quality monitor provides real-time monitoring and alerts for pollutants like CO2, PM2.5, PM1.0, PM10, HCHO, TVOC, Temperature, Humidity, and AQI, with 7 distinct alert functions. Stay informed with clear alerts and rest easy with a mute button to silence alarms. Your health and comfort are our priority. Toggle between Fahrenheit and Celsius instantly with a double-press of the "Power" button on this air quality detector.
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Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.

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