Telegraph: The Prince described the climate change challenge as ‘the greatest threat to mankind’ Photo: REUTERS Describing the challenge as “the greatest threat to mankind”, he called for nations to save the planet by halting the destruction of tropical rainforests. “The point is that all of us — the whole word — are in this together and this is why, together, we need to deploy all possible measures to stop tropical deforestation,” he said. The Prince made his speech at the …