Berkshire Hathaway Inc shareholders on Saturday overwhelmingly rejected six proposals for environmental, social and governance changes at Warren Buffett's conglomerate, all of which the billionaire investor and his board opposed. By margins of at least 3-to-1, shareholders voted against three proposals that Berkshire disclose more about its climate-related risks or greenhouse gas emissions and efforts to address them, and its efforts to promote diversity. They also voted down by a nearly 10-to-1 margin a renewed call for an independent director to replace Buffett as chairman.