"A year ago, I said at this meeting that we needed a plan for tackling climate change, a plan fit for the challenge that we face.
"A year later, we've seen great leadership on climate from countries and companies, but emissions are still rising and the poor are still suffering," Kim wrote in a blog for the World Economic Forum (WEF) Annual Meeting here.
He welcomed the UN Secretary General's call for a leadership summit on climate change in September this year.
Asking the private sector as well as governments leaders at Davos to "act in substantial ways", Kim said now is the time to act for future generations before it is too late.
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"This is the year to take action on climate change. There are no more excuses. If we fail, our children and grandchildren will ask us why we didn't act when it was still possible to do so," he added.
"We need leaders who are thinking foremost about taking care of the most vulnerable in this generation and the generations ahead," Kim said.
Stating that governments should put a price on pollution, the World Bank chief said performance standards for buildings, cars and appliances, among others, should be set.
Putting a price on carbon through either taxes or market-based instruments are the key, he added.
"The so-called long-term investors must recognise their fiduciary responsibility to future pension holders who will be affected by decisions made today.