When we asked kids about their dreams for the future, they said that they wanted to have go-away cloud machines, to make the weather better.

We have realised the impact of light on human health and a new Dark Sky Movement might drive the public debate forward in considering less light pollution in the cities.

Drones, or Unmanned Aerial Vehicles (UAVs), are already being used in humanitarian response around the world, already used in disasters such a Hurricane Sandy in 2012 and Typhoon Haiyan in 2013.

Creating moss facades on buildings can create them into air purifiers. Ultimately, making them healthy and allowing cities to become healthier.

Currently, there are many micro winds in our cities, from tube system to people moving around. At the same time, we are at risk of not having electricity due to threats to the grid. There is a potential to harvest these city micro-winds to use for power.

There are paints, tiles and cements that can be placed on the facades of buildings to purify the air by using sunlight. These systems are based on the activation of Titanium dioxide (TiO2) by the energy of the UV light. This reaction produces a numer of components that can triggers the degradation of pollutants absorbed onto the catalytic surface.

New ways to reforest the cities, buildings covered in plants and trees are a solution to fight against smog in highly urbanised and polluted areas.

AR has the potential to become an overlay to the real world, helping citizens access and assess air pollution quality near them and their potential risk.

The more sensors, the better measurement. Today, many sensors are not fully used in cities, so we will rely on cheaper versions and crowdsourcing to fully understand the level pollution in our cities.

Nanobionic plants have embedded nanoparticles in the leaves of the plant, and this allows them to get new functions using the energy metabolism of the plant itself. Currently, they can have the technology to use as dim lights, however, in the future, they might be able to be used as streetlights or to sense environment quality.