New Delhi: Chief Minister Arvind Kejriwal on Thursday expressed his gratitude to Prime Minister for supplying 730 metric tonnes (MT) oxygen to the National Capital on May 5.In a letter to the PM, he requested for daily supply of the same amount of oxygen to Delhi. Delhi requires 700 metric tonnes of oxygen per day. We were constantly requesting to the Central Government to give so much oxygen to us. For the first time yesterday, Delhi has received 730 metric tonnes of oxygen”, he said. ”I express my heartfelt gratitude on behalf of the people of Delhi. You are requested that at least such amount of oxygen to Delhi is provided every day and no deduction should be made in it. The entire Delhi will be grateful to you for this,” the Chief Minister said in his letter.