South African President Cyril Ramaphosa says the Group of 20 bloc has sufficient “shock absorbers” to function effectively if a Donald Trump administration promotes an America First policy at the expense of international cooperation.

South Africa's G20 presidency next year will focus on mobilising finance for nations stricken by climate-induced disasters and extending debt relief for developing countries, President Cyril Ramaphosa said on Tuesday.

South Africa says it will use its presidency of the G20 – the first by an African nation – to put the priorities of the African continent onto the agenda of the powerful global economic forum.

South Africa has taken over the presidency of the world’s premier economic forum, the G20, from Brazil. The G20 presidency operates on a troika system made up of the current, previous and next holders.

South Africa takes over the G20 presidency on Sunday, the first African country to lead the forum, though its focus on issues such as inclusive growth and climate change risks bumping up against the hard reality of trade wars and diplomatic tensions.

Together, G20 members account for around 85 percent of global gross domestic product and 75 percent of international trade.