World leaders pledge to tackle effects of the pandemic

The 21 leaders of the Asia-Pacific Economic Cooperation have met today (albeit virtually) to pledge urgent action to tackle the health and economic effects of the Covid-19 pandemic. Eric Martin of Bloomberg News in Washington DC gives us more context about what was discussed. China has launched the world's largest carbon trading market in a bid to curb emissions. The BBC's Andrew Walker explains how such schemes work, and we ask Sha Hua of the Wall Street Journal whether the new market is likely to achieve its goal. And how genuine are the online reviews for things we decide to buy - and what does this mean for the future of e-commerce? Our reporter Rebecca Kesby investigates the ways some sellers post fake reviews to boost sales. Fergus Nicoll is joined throughout the programme by Colin Peacock of Radio New Zealand, who is in Wellington. (Picture: New Zealand prime minister Jacinda Ardern. Picture credit: Getty Images.)