Cities globally install fresh air kiosks that allow people to get fresh clean air whenever they need it.

Smell maps can provide with an understanding of the olfatory landscape of cities, recording how odors change as cities evolve. It can also allow those more sensitive to understand where they should travel in the city.

Terrorist threats could be able to be identified through the use of odour, by using trained neural networks this could be the potential future airport security barrier.

Buildings as part of their branding could have their own scent playlists on different floors to give a varied experience for indviduals.

Fragrance-Free Movements might lead to further individual responsibility of fragrances, and perhaps, this could mean a future where individuals are taxed on their use of chemicals.

Digital scent technology (or olfactory technology) is the engineering discipline dealing with olfactory representation. It is a technology to sense, transmit and receive scent-enabled digital media.

The past year we have seen smell become a branding phenomena, but there is a counter-movement for smells that are authentic and real not synthetic.

In many large cities, the air is becoming so dirty that people look for ways to escape it into somewhere with clean air. Many travel agencies start to market their holidays as fresh air tourism.

Nose plug filters are being used to combat pollen, pollution, pet allergen, dust or fumes. In cities, these are now frequently seen.

Artificial noses might be the future of disease discovery. Research has found that scents can pick up diseases such as Parkinsons.