newly discovered footage of mardi gras, the oldest moving images of new orleans. hello. welcome to the programme. joe biden used a visit to a former coal plant in massachusetts to issue the latest stark warning on the threat posed by climate change. the us president is using executive powers to usher in measures including offshore wind farms and expanded flood control. more on that in a moment. meanwhile, wildfires are still raging in europe. in south west france, president macron has been to see the devastation caused by a blaze that forced almost 40,000 people from their homes. 0ur correspondent lucy williamson was there and sent this report. fire chiefs are too cautious to talk about a turning point, but the fire here has stabilised enough for president macron to visit teste de buch today to congratulate the crews. translation: we know the weaknesses - in the management of this forest. we have to make it grow again, but with different rules and precautions. you can see how
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