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"Exploring opportunities for future collaboration on commercial-scale operations and investments in hydrogen production is vital if Australia is to realize the significant economic benefits and job creation opportunities hydrogen brings," he said in a statement.

"Energy is the golden thread that connects all the Sustainable Development Goals," United Nations Secretary-General Antonio Guterres told a high-level symposium on global energy interconnection at UN Headquarters in New York on Nov 1.

"Due to improper eye habits, the age of onset of cataract has also shown a younger trend in recent years. Without timely treatment, cataracts not only cause blindness, but also bring a series of other diseases, such as glaucoma," said Yao Ke, chairman of the committee of the ophthalmology branch of CMA.

"Disaster events can cause irresistible trauma and crisis to the mind and body," she said.

"Facebook's actions highlight some of the early success of the Christchurch Call and show real change is happening. There is more work to do, but we have made a good start," Ardern said.