(UNITED NATIONS) — Leader after leader told the United Nations on Monday that they will do more to prevent a warming world from reaching even more dangerous levels. But as they made their pledges at the Climate Action Summit, they conceded it was not enough. Sixty-six countries have promised to have more ambitious climate goals and 30 swore to be carbon neutral by midcentury, said Chilean President Sebastian Pinera Echenique, who is hosting the next climate negotiations later this year. Heads of nations such as Finland and Germany promised to ban coal within a decade.