Experts from home and abroad have applauded President Xi Jinping's announcement on scaling up the country's post-2020 climate action commitment, saying the move shows that China has lived up to its responsibility as a major country and will provide impetus for the rest of the world to ratchet up climate action.

China aims to have carbon dioxide emissions peak before 2030 and achieve carbon neutrality before 2060, Xi announced on Tuesday while addressing the general debate of the 75th session of the United Nations General Assembly via video.

Carbon neutrality means the realization of net zero carbon dioxide emissions by stopping emissions, or by both reducing emissions and removing emissions from nature.

"China will scale up its Intended Nationally Determined Contributions by adopting more vigorous policies and measures," Xi said.

The Intended Nationally Determined Contributions are national post-2020 climate action commitments submitted by countries before reaching the landmark Paris Agreement on climate change in 2015.