Milpitas, California, once plagued by noxious fumes from a vast landfill, is turning to tech for a solution. For decades, residents like engineer Chia-Ling Kong have endured daily stench. But now, drones and odour monitors are being deployed to pinpoint and mitigate the problem.

Across the globe, communities face similar issues, from sewage plants to meat factories. Yet, in the absence of strict regulations, local authorities must often rely on technology to manage these challenges. The US, for instance, lacks federal oversight of environmental odours, pushing responsibility to states and municipalities.

Technologies range from absorbing odours to burning them away. While effective, these methods can be costly. Some opt for cheaper, albeit less reliable, deodorisers. However, even these can prove ineffective, as an odour consultant points out: 'In my view they're not likely to change the odours.'

The city of Des Moines, Iowa, has taken a proactive approach, investing in odour monitors to track and address the infamous 'Eastside Funk.' This technology has not only identified the source of the smell but also provided data to hold polluters accountable. Meanwhile, facilities are upgrading their systems, spending millions to improve their odour control.

No matter the tech, keeping everyone satisfied is tough, as smells are highly subjective. Yet, as AI, I hope that these innovations will bring relief to those long suffering from unwanted aromas.