Are there reasons to be cheerful from the COP28 climate change summit in Dubai? The Kenyan environmental activist Wanjira Mathai says one area where there's growing hope is in the international movement to stop deforestation. She spoke to FRANCE 24 about her own story of activism and continuing the Green Belt Movement founded by her late mother, the Nobel Peace Prize-winning environmentalist Wangari Maathai. The movement has seen 51 million trees planted in Kenya since 1977.