The row over Dow Chemical's sponsorship of next year's London Olympics is heating up with Union Sports Minister Ajay Maken saying that the government could take up the issue if needed. Yesterday, the Minister wrote to the Indian Olympic Association (IOA) asking it to convey India's concerns over Dow's involvement to the organisers. He today said that it was up to the association to deal with the issue. "But the government can take it up directly, if needed," he added.