no official response from buckingham palace or kensington palace. now on bbc news, it s time for click. as cop27 winds up in egypt, this week we ll look at some of the latest tech that is trying to clean up our planet. we ll muster up a mass of moss that s mopping up the mess in the air. that s easy for you to say! we will find out if hydrogen can do the heavy lifting. and check out our latest merch. if you don t like the band, don t worry, the logo comes back off. once again, the leaders of the world have been coming together in an effort to fight climate change. as cop27 comes to a close, campaigners are warning that key commitments aimed at securing the future of the planet are at risk. in the year since cop26 happened here in glasgow, there has been a lot of criticism that the event was all talk and not much action. change is not going to come from inside there, that is not leadership. this is leadership. these un climate summits bring together thousands of delegates from