Tonga Now: rlier in April of this year the World Health Organization (WHO) warned that the health of hundreds of millions of people might be put at risk by the effects of climate change. The WHO regional director, Dr Shigeru Omi, said that global warming had already impacted on lives and health and that this problem would pose an even greater threat to mankind in coming decades unless action was taken. The WHO estimates that climate change may already be the cause of the increase in the …