Imagine a 2040 where clean and sustainable energy is the key change. In this world, almost all energy comes from renewable sources such as solar, wind, hydro and nuclear fusion. Energy storage technologies are so sophisticated that there is no waste of energy and every building can generate and store its own electricity.

The transport system is also revolutionary, with fully autonomous electric and hydrogen vehicles dominating the roads, and urban streets redesigned to make the comfort of pedestrians and cyclists a priority. Travel between cities is by ultra-fast electric trains, which replace most short-distance flights, reducing pollution.

The climate crisis has been curbed through targeted pollution reduction and the use of carbon capture technologies. Cities have become greener - vertical farms on skyscrapers, green roofs and smart air filtration solutions help keep the air clean. Natural ecosystems have been restored and populations of endangered species stabilised.

In addition, the availability of energy has revolutionised society by making the basic costs of living (electricity, transport) virtually free, allowing people to focus on creativity, science and personal development rather than just working for a living.

This would be a future where life is not only more sustainable, but also more comfortable, with more freedom for everyone.