Lucknow, Dec. 22 -- Samajwadi Party national president and former chief minister Akhilesh Yadav has said that saving the Aravalli hills is a necessity. Posting an appeal to the people of Delhi, he said the NCR (National Capital Region) will survive only if the Aravalli hills survive. He also warned that unchecked destruction would worsen smog, harm biodiversity and cripple the region's economy and health. In an open letter posted on social media on Sunday, Yadav wrote, "Dear Delhiites, If the Aravalli range survives, Delhi will remain green! Saving the Aravalli is not an option, but a necessity. Remember, only if Aravalli survives will the NCR survive. Saving the Aravalli is crucial because it is a natural protective shield, a natural defence for Delhi and the NCR. The Aravalli can bring back the stars that have disappeared from Delhi's skies and save the environment." "The Aravalli mountain range reduces air pollution in Delhi and plays a vital role in rainfall and water conservation. The biodiversity of the NCR is preserved by the Aravalli. It can save the wetlands that are disappearing and bring back the birds that have vanished" Yadav wrote. Meanwhile, Yadav on Sunday accused the BJP-led government of working towards a "one nation, one businessman" agenda. In a statement, he said, "The BJP wants to consolidate every business in the country into the hands of a select few, based on the principle of 'one business, one source of funding'. This way, they won't have to go to different places for donations."...