The world approved a bitterly negotiated climate deal Sunday but poorer nations most at the mercy of worsening disasters dismissed a $300 billion a year pledge from wealthy historic polluters as insultingly low. The world approved a bitterly negotiated climate deal Sunday but poorer nations most at the mercy of worsening disasters dismissed a $300 billion a year pledge from wealthy historic polluters as insultingly low. Environment Phys.org – latest science and technology news stories