gaps in our defences and widen and deepen our wall of defence. over the summer we have continued to do that in several ways. the uk government minister responsible for the next round of global climate talks has been meeting officials in china. alok sharma said he was there to discuss how to make sure the november summit in glasgow is successful — and with just eight weeks to go the pressure is on. 0ur science editor, david shukman, looks at the environmental challenges ahead for world leaders. year after year, the countries of the world have gathered for huge conferences on climate change. i've seen how a few have gone badly wrong, like in copenhagen in 2009. delegates walked out amid confusion and a lack of progress. well, the first challenge is to make sure that there are steep and rapid cuts in emissions of the gases heating the