John Holdren

Any objective look at what science has to say about climate change ought to be sufficient to persuade reasonable people that the climate is changing and that humans are responsible for a substantial part of that - and that these changes are doing harm and will continue to do more harm unless we start to reduce our emissions.

I think we ultimately ought to look to put all uranium enrichment and fuel reprocessing, if any is done, under multinational control. Those are the two technologies by which nuclear energy can be translated into nuclear weapons programmes.

At CARE, a leading humanitarian organization, we recognize people live their lives in a holistic manner. Issues such as health care, education and economic empowerment cannot be addressed in a vacuum. Thus, effective programs need to tackle the multiple root causes of poverty.