When the 2026 men's World Cup kicks off in Mexico City on 11 June, more than a billion people will be watching. So will the logo of Saudi Aramco - the state-owned oil company that is, by most measures, the largest corporate polluter on the planet, now stitched into the fabric of the world's most-watched sporting event as FIFA's biggest sponsor.

Here’s all the resources you need to get clued up on the most polluting World Cup ever.

Professional footballers warn the climate crisis is worsening player welfare risks. In a new open letter, players back medical experts’ call for stronger heat-stress protocols for the upcoming FIFA World Cup and serious climate action from FIFA.

With just weeks to go before the most polluting World Cup ever takes place across three countries in North America, the Cool Down Network launches its climate guides to six of the host cities most likely to suffer heat extremes.

In a new film with Badvertising, we spoke to fans about their earliest memories of the beautiful game against a backdrop of climate inaction from FIFA.

Leading experts in health, climate science and sports performance have signed an open letter urging FIFA to strengthen heat protections for players at the men’s 2026 World Cup, warning that current safety guidelines are “impossible to justify.”

Oil giant Aramco has joined with likeminded allies to launch a new product line aimed at travelling World Cup fans. The FootbOil range of tanning oils is fronted by Gianni Infantino and Donald Trump and designed so that supporters can thrive in the World Cup heat this summer.

Laura Briggs, of The Green Runners, lays out why she has chosen to run the Camino Primitivo in Spain in the most sustainable way possible.

Leading climate scientists, mountain guides, skiers and sustainability experts from across Europe have signed an open letter to the organisers of the FIS Alpine World Ski Championships, calling on them to deliver “the most sustainable winter sports event ever” to ensure the championships become a turning point for climate leadership in global sport.

Nearly 90 Olympians and Paralympians, alongside more than 40 athletes hoping to compete at future Olympic Games, write to the IOC stating that fossil fuel sponsorship is incompatible with the long-term future of sport.

Polling across seven leading winter sports nations in Europe and Canada finds that large majorities of the public, and even bigger majorities of winter sports fans, believe the Olympics and winter sports more broadly should stop advertising companies driving the climate crisis. The findings expose a growing disconnect between the values of audiences and the commercial partnerships underpinning elite winter sport.

Polluting sponsors of the Winter Olympics are melting the snow the games depend on - new research by Scientists for Global Responsibility and the New Weather Institute reveals how the climate impact of the Winter Olympic Games, and several of its key sponsors from heavily polluting industries, are in danger of torching the Games’ own future. 

FIFA President Infantino’s steadfast commitment to expanding football’s impact on the world’s climate has been recognised with a special new award, Fossil Free Football’s “Football Climate Impact Prize”. Infantino’s crowning achievement is the sale of the world’s biggest platform, the FIFA World Cup, to the world’s biggest polluter, Saudi state oil company Aramco.

Playing football outside in the warmer months has been part of European life for generations; but fan climate campaign group Fossil Free Football are concerned that recent trends in extreme weather may be putting that tradition at risk.

Nicola Barr of St. Kilda FC in the AFLW chatted with Cool Down about why she joined the Fossil Free Declaration and what she hopes to achieve through it.

Rhydian Cowley OLY chatted with Cool Down about his decision to join the Fossil Free Declaration and what he hopes to achieve with and through the initiative.

Freddie Daley writes about the brilliant footballer Héctor Bellerín who uses his platform to draw attention to challenges facing humanity ranging from racial and gender equality, to the rights of refugees and the need to empower young people and now, especially the climate and ecological crisis.

As part of our Fossil Free Declaration series, Danish footballer Sofie Junge Pedersen reflects on the growing intersection between sport and sustainability. Drawing on her experiences across Europe’s top leagues, she talks about the responsibility players have to lead by example and why standing up for the planet matters just as much as what happens on the pitch.

In the latest instalment of our Fossil Free Declaration interview series, Paralympic alpine skier Anna Turney discusses why she is speaking out for climate action and lending her voice to protect the mountain environments that make her sport possible.