The former Cuban President Fidel Castro has praised US President Barack Obama's speech before the UN General Assembly for its words on climate change.

Mr Castro described President Obama's admission that the US had been too slow to act on climate change as a brave gesture.

But he added that the American capitalist system was incompatible with a clean planet.

He praised the American president for saying that the US had been slow to act on climate change and that richer countries had to take the lead since they had caused much of the damage.

No other US president, he said, would have had the courage to make such remarks.