By , LONDON/BRUSSELS (Reuters) - U.N. Secretary-General Antonio Guterres called on every country to declare a “climate emergency” on Saturday, as world leaders marking the fifth anniversary of the Paris climate accord made mostly incremental pledges relative to the scale of the crisis.Guterres made his call at a summit aimed at building on momentum behind the Paris deal, buoyed in recent months by renewed commitment from China and the prospect of U.S. President-elect Joe Biden bringing the United States back into the pact.Nevertheless, the dozens of leaders who spoke mostly offered tweaks...…By , LONDON/BRUSSELS (Reuters) - U.N. Secretary-General Antonio Guterres called on every country to declare a “climate emergency” on Saturday, as world leaders marking the fifth anniversary of the Paris climate accord made mostly incremental pledges relative to the scale of the crisis.Guterres made his call at a summit aimed at building on momentum behind the Paris deal, buoyed in recent months by renewed commitment from China and the prospect of U.S. President-elect Joe Biden bringing the United States back into the pact.Nevertheless, the dozens of leaders who spoke mostly offered tweaks...WW…