The Indian Railways has set a target of bringing down carbon emission to zero by the end of the next decade, Railway Minister Piyush Goyal said during an online meeting with the bosses of some renewable energy sector firms today. "By 2030 we will be a net-zero railway, our carbon emission will be zero. Indian Railways transports nearly 8 billion passengers and 1.2 billion tonnes of freight every year. Ours will be the world's first railways of this scale to go green," Mr Goyal tweeted.