hello, iam rajini vaidyanathan, the bbc�*s south asia correspondent in north india.re watching countdown to the cop26 global climate summit, a series of programmes from around the world looking at the issues and challenges of climate change as nations prepare to gather in glasgow in november to discuss this global emergency. india is a nation on the front line of climate change, from cyclones to floods, heat waves to droughts, and nowhere is this more keenly felt than here in the state of uttarakhand. we are here on the banks of the river ganges in the foothills of the himalayas. this vast region provides drinking water, irrigation and hydropower to some 2 billion people across asia. but rising temperatures are eroding many of the 50,000 glaziers in this mountain range, threatening water supplies. increasingly deadly forest fires and rising pollution also remain a huge threat. and as climate concerns growin india, there are an increasing number of young activists who are taking up the cause. i met one of these climate activists, 13—year—old ridhima pandey, who is fro