• Blog post

    By Hanna Gronkiewicz-Waltz, Mayor of Warsaw, Poland

    Today I am speaking at the Chicago Forum on Global Cities on a panel called Financing the Global City, where fellow panelists and I will discuss various approaches to financing sustainable infrastructure and the need for collaboration with other levels of government and the private sector to achieve our aims. It presents a great opportunity to share with you a couple of thoughts about the challenges faced by my city – Warsaw, Poland – mainly in the area of sustainable development and climate action. 

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  • Blog post

    Climate change is one of the most significant challenges facing our planet. At the COP21 climate negotiations in Paris in December, I was invited to participate in a number of events that dealt with the role cities can play in pushing national governments to commit to and achieve more ambitious climate change agendas. I have come away from those deliberations more convinced than ever that cities have a pivotal role to play in both mitigating climate change and in adapting to the impacts of climate change.

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  • Blog post

    2015 was an important year for C40, and for our mayors. We saw cities firmly establish their place in the global dialogue on climate change, from gathering at the Vatican to committing in large numbers to the Compact of Mayors, culminating in a fantastic series of events at COP21 in Paris. On top of these milestones, 2015 also marked C40’s 10th anniversary. Throughout the year C40’s 10 Years of Results series featured contributions from our mayors, partners, international political figures and global thought leaders. Below we take a look back through a very productive and exciting year.  

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  • Blog post

    The great Italian writer Italo Calvino once wrote “You take delight not in a city's seven or seventy wonders, but in the answer it gives to a question of yours.” Indeed, throughout human history, people have looked to cities for answers – to questions of economics, trade, public health, culture and education. This week, as national leaders begin to consider how they will deliver on the deal agreed at the international climate negotiations in Paris, they should turn to cities once again for answers.

    An op-ed by Eduardo Paes, C40 Chair and Mayor of Rio de Janeiro, Anne Hidalgo, Mayor of Paris, and Eric Garcetti, Mayor of Los Angeles

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  • Blog post

    The C40 is an exceptional organization that brings together leadership from major cities around the world to take real and lasting action on climate change. From the very beginning, when I was asked as Mayor of Toronto to join the Board of the C40 in 2005, I knew Mayor Livingstone had an idea that was going to make a massive difference. Mayors of large cities that hold statutory responsibilities for large-scale infrastructure such as transportation systems, regional energy production, social housing, water and solid waste management can have a tremendous impact on both reducing greenhouse gas emissions and taking steps to address and forestall the sometimes devastating impacts of the climate change that has already begun. Bringing these mayors together — and through them the hundreds of millions of people they represent- remains an extremely powerful and effective mechanism towards halting climate change.

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