By Lord Hunt & Terry Townshend - We have learnt to expect surprises at UN climate change summits. At Durban, a year ago, there was the unexpected, but welcome, agreement to begin negotiations on a new legally binding instrument involving all major emitters of greenhouse gases, to be finalised by 2015, and to take effect in 2020.
How many times have government leaders pledged to reduce carbon emissions or tackle the accelerating loss of biodiversity? If statements and pledges were all that it took to fix the biggest global challenges, the world would not be faced with dangerous concentrations of greenhouse gases, shrinking rainforests and extinctions at up to 1,000 times the natural rate.
More than a dozen factors, ranging from declines in flowering plants and the use of memory-damaging insecticides to the world-wide spread of pests and air pollution, may be behind the emerging decline of bee colonies across many parts of the globe.