austin hayward, bbc news. wales have the toughest task of them all today but they were leading against the world champions south africa — at the principality... 12—9 the score at half time... dan biggar�*s boot keeping them just ahead... that's all from sportsday. you can get all the latest sports and reports on the bbc sports website. next up on bbc news ros atkins on tree planting. it's no longer controversial to say humans are causing climate change but what we should do about it is less settled. borisjohnson is hosting the cop26 climate summit in glasgow, and this is his mantra. we can get real on coal, cars, cash and trees. now coal, cars and cash remain difficult, pressing issues. but trees, you'd think they are more straightforward. we know trees absorb carbon dioxide, which is one of the gases that causes climate change, and there are lots of plans to plant more of them. this was donald trump back in 2020. today, i am pleased to announce the united states willjoin 1 trillion trees initiative, being lau