Leaders of the Group of Seven (G7) countries will commit to accelerating their transition away from fossil fuels this decade, according to a draft of a statement to be issued at the end of their ongoing summit in Italy.

"We will transition away from fossil fuels in energy systems in a just, orderly and equitable manner, accelerating actions in this critical decade, to achieve net-zero by 2050 in keeping with the best available science," says the draft seen by Reuters.

Other commitments on climate policy in the draft include a pledge "to phase out existing unabated coal power generation in our energy systems during the first half of 2030s."