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This week a year’s worth of rain fell in just three days in China’s Henan province, flooding roads and public transport systems, killing dozens and displacing thousands. Floods are common in China’s rainy season, but this event is being linked to the climate crisis. China is the biggest emitter of greenhouse gases in the world – and many of its most carbon-intensive sectors employ vast numbers of people. At the same time the country has led efforts to develop green technologies like solar and wind, bringing down prices and encouraging the global shift away from fossil fuels. China says it shouldn’t be expected to follow the same decarbonisation timetable as major Western economies. But the US Climate Envoy John Kerry this week insisted that efforts to keep global warming to 1.5 degrees Celsius will be "essentially impossible" without faster action from Beijing. So how crucial is China to the fight against climate change? Ritula Shah is joined by a panel of experts.