United Nations climate chief Simon Stiell

Governments must stop revisiting climate commitments and start delivering on them, United Nations climate chief Simon Stiell said on Monday, warning that continued dependence on fossil fuels was driving inflation, economic instability and growing vulnerability to climate disasters.

Opening the annual UN climate talks in Bonn, Germany, Stiell urged negotiators to focus on implementing agreements rather than reopening old debates.

He warned that the world was running out of time to respond to worsening climate impacts and economic shocks.

His remarks set the tone for two weeks of negotiations that will focus on adaptation, climate finance and the implementation of the commitments made under the Paris Agreement.