In its joint climate-change announcement with the U.S. on Wednesday, China set goals it has never agreed to in a global accord, including a date for when its carbon-dioxide emissions will hit a ceiling. But the goals themselves hewed closely to the economic trajectory Beijing has charted under existing environmental policies, environmental watchdogs and analysts said. Under the terms of the announcement by Presidents Xi Jinping and Barack Obama , China will increase its share of nonfossil fuels in total energy consumption to around 20% by 2030, and carbon-dioxide emissions will peak — or start decreasing in annual absolute volume — around that year. That is roughly in line with the government’s five-year plan, or broad development blueprint, in 2013, which set a target for nonfossil fuels to account for 15% of China’s energy mix by 2020