本期《基石》即將付梓，世界各國領(lǐng)導(dǎo)人將在法國巴黎舉行會議，就聯(lián)合國氣候變化框架公約下的第21次外空會議進行談判。長期以來，這些會議的勢頭一直在增強，未來的基石問題將涵蓋這些成果，因為這些成果涉及煤炭工業(yè)和更廣泛的能源界。正如我們過去所做的那樣，我們將繼續(xù)側(cè)重于政策方法和技術(shù)，包括高效率、低排放（HELE）燃煤發(fā)電廠和碳捕獲、利用和儲存，使煤炭在一個碳約束的世界中得到利用。

A s this issue of Cornerstone goes to press, world leaders are meeting in Paris, France, for the COP21 negotiations under the United Nations Framework Convention on Climate Change. Momentum for the meetings has long been building, and future issues of Cornerstone will cover the outcomes, as they pertain to the coal industry and the broader energy community. As we have done in the past, we will continue to focus on policy approaches and technologies—including high-efficiency, low-emissions (HELE) coal-fired power plants and carbon capture, utilization, and storage—which enable coal utilization in a carbon-constrained world.