From the dirtiest to the cleanest: Mexico City’s journey

Twenty-one years ago Mexico City was rated as one of the most polluted in the world. What steps were taken to do away with the dirty tag?

Energy transition is now a must

What do the people of France think of global warming? France has temperate weather, so we are not as badly hit. But there have been big storms, and floods and droughts and sometimes both. There are a few scientists who are climate skeptics but do not have much support. Interviewee:  Marie-Helene Aubert

Novel Therapy

You suggest beta lactams, used in antibiotics, are effective anticancer drugs. How did this idea come to you? Interviewee:  Bimal K Banik

'Organic cotton production and consumption should become a mass movement'

Before taking up organic cotton were you growing conventional cotton? No. We started organic farming 28 years ago. Organic farming is our way of life. Organic cotton cultivation was started in 1991. In our opinion, there cannot be anything called conventional cotton now. It must be either BT or organic. There is nothing in between. How big is your farm? Interviewee:  Vivek

How Bhutan is grappling with climate change

How is Climate Change is affecting Bhutan? Interviewee:  Ugyen Tshewang

‘We’ll need a geological repository to store nuclear waste only after 30-40 years’

India has a policy to reprocess spent fuel. It is said that only 2-3 per cent of the spent fuel generated from our nuclear reactors is actually waste and the rest can be reprocessed. Is it true? How do we dispose of this waste? Interviewee:  P K Wattal

The minimum radioactive dose for treating thyroid cancer

What was your study about and what were the conclusions reached? Interviewee:  Chandrashekhar Bal

‘People often talk of the Gandhian model of development, but if such a model is genuinely Gandhian then it is not about development’

We often talk of two visions of development, the Gandhian vision and the Nehruvian vision. What is the fundamental difference between the two? Interviewee:  Ashis Nandy

‘Farmers are not casino players’

Why a film on Vidarbha farmers? Interviewee:  Micha X Peled

'Breakthroughs in material sciences key to sustainable economy'

Why is there a need for new materials? Interviewee:  Peter Littlewood