BAKU, Azerbaijan — United Nations climate talks adopted a deal to inject at least $300 billion annually in humanity’s fight against climate change, aimed at helping poor nations cope with the ravages of global warming in tense negotiations in the city where industry first tapped oil. [time-brightcove not-tgx=”true”] The $300 billion will go to developing countries who need the cash to wean themselves off the coal, oil and gas that causes the globe to overheat, adapt to future warming and pay for the damage caused by climate change’s extreme weather.