For all the weeks of negotiation and hard-headed diplomacy that go into the text of an international agreement, the words that result in the end aren¡¯t a magic spell.

Whether the communique resulting from the Glasgow climate conference promises to ¡°accelerate the phasing out of coal and subsidies for fossil fuels¡± (as initial drafts proposed) or instead to escalate ¡°efforts towards phase-down of unabated coal power and phase-out of inefficient fossil fuel subsidies,¡± (in the softened language of the final agreement), it will barely change what the world¡¯s big emitters do over the coming years.

At the same time, the governments that sign such agreements clearly do believe that words have a power of enchantment. Why else has it taken 26 meetings for a passage singling out fossil fuels to make it into the wording of a climate agreement? Language crystallizes the more important reality that¡¯s emerging away from the conference halls in power stations, industrial facilities and government offices around the world. In its modest way, it also helps edge that process along.