The UNESCO has urged that strong decisions addressing climate change have to be made after negotiations and also that these decisions have to be implemented.

Irina Bokova, Director-General of the United Nations Organization for Education, Science and Culture (UNESCO), made the remarks at a press conference at the COP21 on Friday.

"We all know that unless we change the mentality, unless we change the way we consume, it will be very difficult to implement even the most positive and important decisions that this conference will take. The UNESCO has been leading in this area," said the UNESCO chief.

She said, when further explaining the relevance between the UNESCO and the COP21, that the UNESCO has been committed to promoting education for sustainable development and education for climate change.

Moreover, she said that the UNESCO also has done a lot of other work that is relevant to the COP21, including water management, the science and the sustainability of the ocean.

The chief also expressed concern over climate change, saying many of the heritage sites on the list of the UNESCO are unfortunately affected by global warming and climate change, especially at the marine sites.