Prof Tim Benton from the University of Leeds says that tough choices may have to be made.
The technology has been developed by a team from the University of Leeds, UK, led by Dr Richard Clayton.
More than 500 medical students at the University of Leeds are being issued with iPhones which can access online text books.
Alastair Hay, professor of environmental toxicology at the University of Leeds, disputed Ms Creagh's claims about the drug causing cancer in humans.
Mike Bennett, St Gemma's professor of palliative medicine at the University of Leeds, said both doctors and patients needed reassurance about opioids.
Geophysicists from the University of Leeds have also helped with the investigation.
Meanwhile, student Niall McGlion, 20, is studying politics at the University of Leeds and travelled to Manchester on Wednesday to help with the cleaning operation.
The University of Leeds said Mr Connell was a former student who completed a physics programme in 2004, graduating with a diploma in higher education.
In 1997 Oliver Carsten, a professor of transport safety at the University of Leeds in England, coordinated a major European research project on intelligent speed adaptation.
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"It allows us to make some firm conclusions, " said Andrew Shepherd, a professor of earth observation at the University of Leeds in England and a lead author of the study.
"He sure looks like he gave up basketball, " said Aidan Foster-Carter, a Korea specialist and professor at the University of Leeds in England, joking about how much he has grown.
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In 2004, he conducted an electromagnetic survey of the site with the help of Dr Adam Booth, then of the University of Leeds, along with a further ground-penetrating radar survey.
Craig Jordan, director of the Lyn Sage Center at Northwestern University, found when he was working at the University of Leeds in England that tamoxifen is useful in treating breast cancer.
"Reducing emissions from diesel engines and domestic wood and coal fires is a no-brainer as there are tandem health and climate benefits, " said Professor Piers Forster from the University of Leeds.
The University of Leeds team, who are presenting their work at a European Congress on Obesity in Liverpool, say the findings show that young children are aware of the huge societal interest in body size.
According to David Jackson, professor of Russian and Scandinavian art histories at the University of Leeds, these qualities allow people with little knowledge of Expressionist art to relate to what was, when it was first shown, an avant-garde work.
Rachel Muers, Quaker theologian and senior lecturer in Christian studies at the University of Leeds, said that Quakers are looking to "affirm and celebrate" same sex unions in a religious context and have been pushing for legislation to allow this since 2009.
Estimates of PIP implants in each country are based on the number sold to plastic surgeons, but no one knows how many were actually inserted, said Simon Kay, a plastic surgeon at the University of Leeds and past president of the British Association of Plastic, Reconstructive and Aesthetic Surgeons.
"It's pretty convincing stuff, " commented Piers Forster, professor of climate change at the UK's University of Leeds and a former lead author for the Intergovernmental Panel on Climate Change's assessment of factors driving global warming.
Members of the Leeds Metropolitan University triathlon team, where the brothers train, were among those cheering the pair to glory.
Of course correlation is not causality, but speaking on the Today programme this morning Alastair Hay, a professor of environmental toxicology at Leeds University, described the research as compelling.
Two internationally renowned psychologists, Professor Glenys Parry, the Director of Research and Development at Sheffield NHS Trust, and Dr Michael Barkham of Leeds University, will be among those to address the conference.
Dr Heather Shore, a social history expert at Leeds Metropolitan University, describes the period of the 1830s and 1840s as one in which a great deal of "big society"-type activity was undertaken.
Professor James Walker, consultant obstetrician at St James's University Hospital in Leeds and spokesman for the Royal College of Obstetricians and Gynaecologists, said women should not be alarmed by the findings but should be informed.
Professor James Walker, consultant obstetrician at St James University Hospital in Leeds, said some areas of the country had been more successful than others in cutting caesarean rates.
Harold Goodwin, professor of Responsible Tourism Management at Leeds Metropolitan University in the UK, wrote about his experience in the Cape Town, South Africa township of Khayelitsha, with a tour operator that was well-known in the community.
Professor Paul Gately, professor of exercise and obesity at Leeds Metropolitan University, told The Guardian that it was difficult to give "one-size-fits-all" advice.
Philip Rees, professor of population geography at Leeds University, says that during the last southern house-price bubble in the late 1980s, there was net immigration to the north.
The Leeds University team believe air transmission could be a factor in some of this.
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