Each week, we scour the worlds of innovation, tech for good and social impact to bring you seven of our top stories…

1. London-based LGBTQIA+ health-tech firm Lvndr is developing new inclusive sexual health solutions for the LGBTQIA+ community, by partnering with local authorities around the UK.
2. British start-up ‘Polymateria’ is developing a new biodegradable plastic pollution solution, aimed at decomposing plastic into wax that can be digested by nature.
3. Students at the National Polytechnic Institute of Cambodia transform a school chair into a manned drone that could allow easier access to fires on upper floors of buildings.
4. Mastercard has launched Strive UK, a three-year project providing digital tools and skills to 150,000 SMEs in the UK so that their businesses can grow.
5. London-based start-up ‘Sojo’ helps customers repair their thrifted second-hand clothing through a network of independent seamstresses, all while promoting sustainable fashion.
6. Together with development company ‘SignAll’, Snapchat launched new augmented reality lenses teaching the basics of fingerspelling in American Sign Language to celebrate the International Week of the Deaf.
7. Researchers from the US Geological Survey carried out radiocarbon dating on human footprints revealing that humans reached the Americas 7,000 years earlier than previously thought.