A、能量守恒定律告诉我们，能量是不会减少的，煤炭、石油、天然气等化石能源使用后，化学能转化为内能耗散了，虽然总能量没有减小，但是可以利用的品质降低了，故依然要节约能源，故A错误；
B、自然界中石油、煤炭等能源是有限的，故会不断减少，故B错误；
C、新能源是可以循环利用的，故人类应多开发与利用风能、太阳能等新型能源，故C正确；
D、人类不断地开发和利用新的能源，如风能、太阳能，本质上都来源于太阳，符合能量守恒定律，故D错误；
故选：C．
第三届中国绿色博览会英文介绍
China Green Expo by the National Afforestation Committee, the national forestry bureau and the local people’s Government hosted by the provincial people’s government, hosted by the Municipal People’s government and the provincial Commission, forestry department, is the highest level of green organization in China’s comprehensive exposition. Third China Green Expo is located in Wuqing District, South Lake scenic area, with a total area of 380 hectares, the park area of 345 hectares, of which the water area of Lake area of about 140 hectares, green and water area accounted for more than 80 of the total area of the park. In order to around the theme of green lets a person and natural harmony, create Aqua blending of natural ecological landscape, green garden of the preliminary design of the overall layout of one axis, Sanhuan, District 9, 18 king, relying on local ecological resource base and in the construction of the South Lake landscape environment to demonstrate our country land afforest career achievements for the purpose, inspire people afforestation green maintaining enthusiasm and advocate the concept of green ecological as the goal, based on the construction of a theme of a novel, distinctive, sustainable development of the green garden.
中国绿化博览会由全国绿化委员会、国家林业局和承办城市所在的省级人民政府共同主办，由承办城市人民政府和所在省绿化委员会、林业厅承办，是我国绿化领域组织层次最高的综合性博览会。
第三届中国绿化博览会位于武清区下朱庄街南湖风景区，总面积380公顷，园内面积345公顷，其中南湖湖区水面约140公顷，绿化和水系面积占园区总面积的80%以上。为了围绕“绿色让人与自然共融”的主题，打造水绿相融的自然生态景观，绿博园初步设计了“一轴、三环、九区、十八景”的整体布局，依托当地生态资源基础和在建南湖景观环境，以展示我国国土绿化事业成就为主旨，激发人们植林护绿热情和倡导绿色生态理念为目标，立足于建设一个主题新颖、特色鲜明、永续发展的绿博园。
望采纳！！
