New Delhi, Nov. 24 -- World leaders from the Group of 20 rich and developing economies broke with tradition and adopted a declaration at the start of their summit in South Africa on Saturday despite opposition from the United States, which is boycotting the two-day talks in a diplomatic rift with the host country.

Vincent Magwenya, the spokesperson for South African President Cyril Ramaphosa, said a leaders' declaration was adopted unanimously by the other members at the start of the talks in Johannesburg. Declarations are usually adopted at the end of G20 summits.

The 122-point declaration urged more global action on issues that specifically affect poor countries, like climate-related disasters and sovereign debt levels, and was promot...