Gordon Brown's green adviser Jonathon Porritt and Science Museum director Chris Rapley have also spoken of the environmental importance of tackling population growth.
Elizabeth Rapley, Institute of cancer Research, said: "This cancer has a poor prognosis6 with fewer than 50% of patients surviving their disease for more than five years."
癌症研究所伊丽莎白·瑞普雷博士说对患这种癌症的人预后较差，能活过5年的还不到50%。
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Dr Elizabeth Rapley, Institute of cancer Research, said: "This cancer has a poor prognosis with fewer than 50% of patients surviving their disease for more than five years."