Hilda Flavia Nakabuye is a Ugandan climate and environmental rights activist who founded Uganda's Fridays for Future movement. She also advocates for greater gender equality and racial diversity in the climate change movement. One of her environmental concerns is saving Lake Victoria, which connects Uganda to neighbouring countries. As part of her activism, Nakabuye visits schools and communities to empower more women to join the fight against climate change, stating that the climate crisis has no borders". She also uses her social media platforms to encourage digital awareness about climate change.

As part of Uganda's Fridays for Future movement, Nakabuye and her fellow climate activists have been dedicated to mobilising a strong youth movement to demand urgent action towards the climate crisis. The Fridays for Future movement in Uganda is now Africa's largest youth movement with over 50,000 young people spread across 52 schools and five universities, as well as members of the general public across Uganda, Tanzania, Sierra Leone, Angola, Gabon, Nigeria and Kenya.

Nakabuye's climate activism has received international attention, having been featured as one of the prominent young women striking for climate change in various news outlets, including BBC News, Guardian, Vox, and Time On 11 October 2019.

She has featured in documentaries as a protagonist such as "Dear Future Children" and "Uncertainty Experts".

She was invited to give a speech at the C40 Mayors summit in Copenhagen, Denmark, to demand urgent action from the leaders of the world's largest cities. Recently she led and coordinated the project "Young Ugandan Voices for COP26, together with the French Embassy in Uganda to ensure youth perspectives from across Uganda would be heard in Glasgow.

She's currently leading a campaign to Stop the East African crude oil pipeline construction in Uganda and Tanzania and is part of the global Stop EACOP coalition.