Conference ends with declaration that science must take a central role in shaping and influencing policy discussions ahead of Rio+20.
UN Secretary General says scientists must become more involved in policy-making process, and announces new position of UN chief scientist.
New report outlines seven measures that will enable world to feed population of 9 billion by 2050 while reducing agricultural carbon emissions
John Beddington says state intervention should be limited to setting frameworks and mechanisms, leaving business to experiment and innovate
Former advisor to British Prime Minister Tony Blair says global climate talks are divorced from reality and time is running out for solution to temperature rise.