World leaders speak at Africa Climate Summit, US pledges $30 million

US climate envoy John Kerry announces that the US will provide "an additional 30 million dollars for climate-resilient food security efforts across Africa" at the Africa Climate Summit in Nairobi.

Kenyan president William Ruto and Tanzanian president Samia Suluhu Hassan called for the lowering of greenhouse gas emissions and green growth solutions.

Landmark African climate talks are set to wrap up on 6 September as leaders seek a united voice to highlight the continent's potential as a green powerhouse, provided the world steps up funding and eases debt.