I have been travelling to India for almost 25 years now, and it is fair to say that I have seen a few changes over the years. I have seen this country dynamically shift in some ways, and in other ways not. I mean India still has masses of terribly poor people eking out a living from day to day, and admittedly, the very-poor have always existed alongside the super-rich. If you go to any major city like Delhi, Mumbai, Kolkata, or Chennai, you will see the slums and the skyscrapers together.

However, what is different now here in the 21st Century, is the emerging middle class, the young, ICT literate and upwardly mobile – that generation of Millennials that have reached adulthood. This was never more evidenced than when I was riding the Metro in Delhi last year. Smartly dressed young men and women absorbed with their smartphones, as interconnected and aware as the rest of us on planet earth.

Delhi’s Metro is ever expanding and easy to use. Colour coded footprints on the walkways help direct you to the right lines; it really is a thing of beauty and an enormous asset for all city dwellers. Sprawling out like a spider’s web across the nation’s capital it transports the young and beautiful, and the not so young and beautiful to wherever they so choose.

My friend Varun, from Varanasi but now living in Delhi with his family, remarked that once you’re inside the Metro system, it’s like being in the UK. However, the moment you emerge, you are back in India again. I knew exactly what he meant; the metro is relatively new and modern and yet when you come out it’s almost like you have been in a time warp, because you are back to the rickshaw wallahs, the roadside vendors, the noise, heat, and pollution. But this is always the way that India has been – rich and poor living side by side.

This is a vastly different story from when I first arrived in India back in November 1995. There was certainly no metro and the preferred method of transport was nearly always an auto-rickshaw, or an old ambassador taxi. But I guess now in this age of climate change, something had to give, because as you will know if you have ever visited Delhi, the smog there is fairly legendary. In fact, at times, it will bring the whole city to a halt because the visibility becomes so poor.

I always knew that air pollution was going to be a challenge for this emerging economic giant. The moment our 400 ton 747 landed with a heavy thud at Indira Gandhi International at Delhi, and its tyres screeched and smoked along the runway tarmac, I could smell the definite bitter, poisonous tang of heavy smog in the air. I cannot say that the air quality has massively improved since then, but with initiatives like greener, less polluting auto-rickshaws and the Delhi’s dazzling metro, things are sure to improve over time.