We empower climate leaders to shape the future of the planet.

We are women, we are mayors, we are entrepreneurs, we are innovators, we are students, we are scientists, we are activists. We are dreamers and doers. We are the makers of tomorrow. 

We care deeply about our planet and its citizens, and we are committed to taking action today that will leave a better world for generations to come. 

When we join our voices together, we are unstoppable. We are powerful. We are Women4Climate. 

Women make up more than half the world’s population, and although they are often disproportionately impacted by climate change, their voices are not always heard due to lack of inclusion and representation at the decision-making level. 

Women leaders played a pivotal role in negotiating the Paris Agreement on climate change in 2015, and will be crucial to its success in the future. Now more than ever, enhancing women’s participation and leadership will be critical to securing a healthy, prosperous and sustainable future for us all. 

Through the Women4Climate initiative, C40 aims to: empower and inspire the next generation of climate leaders through a global mentorship programme dedicated to women in C40 cities; influence the conversation through leadership events and create new momentum and interest among future leaders; and raise awareness through research on gender, cities and climate to highlight the key role women play in championing climate action in cities.

They support us

The Fondation L’Oréal

The Fondation L’Oréal supports and empowers women to shape their future and make a difference in society, focusing on three major areas: scientific research, inclusive beauty and climate action.

Since 1998, the L’Oréal-UNESCO For Women in Science program has worked to empower more women scientists to overcome barriers to progression and participate in solving the great challenges of our time, for the benefit of all. For 22 years, it has supported more than 3,400 women researchers from 117 countries, rewarding scientific excellence and inspiring younger generations of women to pursue science as a career.

Convinced that beauty sits at the heart of the process of rebuilding lives, the Fondation L’Oréal helps vulnerable people to improve their self-esteem through free beauty and wellness treatments. It also enables underprivileged women to gain access to employment with dedicated vocational beauty training. In 2019, more than 18,000 people had access to free treatments and almost 6,000 women took part in beauty training.

Finally, women are affected by persistent gender-based discrimination and violence that are exacerbated by climate change. While they are on the frontline of the crisis, they remain under-represented in climate decision-making. The Women and Climate initiative notably supports women in developing climate action projects, as major actors in addressing the urgent climate crisis and raising awareness of the need for change.


The VELUX Group is proud to be sponsoring the second edition of the Women4Cimate Tech Challenge. We believe women have a central role to play in developing and implementing sustainable solutions to benefit coming generations. We acknowledge the foresight of women and the barriers they often face in bringing their ideas to the fore. Through our support of this challenge, we can help some women to drive climate actions that change cities for the better.

The VELUX Group is also an overall C40 sponsor. Through this sponsorship we can further the dialogues and knowledge sharing that is necessary to lead to partnerships, and thereby actions, to improve the cities of the world.

VELUX products create better living, working and learning environments for people by making the most of daylight and fresh air through the roof. Based on the knowledge we have acquired from more than 75 years in business, we strive to improve awareness about how good indoor climates in buildings can contribute to good health and well-being for the people who occupy them. In our Healthy Homes Barometer, an annual independent research-based report, we investigate the effect unhealthy buildings have on people’s health. We believe that creating healthier buildings, where people spend up to 90% of their time, is key to achieving sustainable, likeable and not least liveable cities.