Sustainability and sport don’t always go together, except of course at the Planet Earth Games, where we passionately believe maintaining a healthy environment is critical to maintaining a healthy lifestyle. Here’s 10 sports stars who are on record caring about climate change.

LAURI MARKKANNEN – Finland-born Chicago Bulls NBA star who leads awareness campaigns on climate change: “People see me as a basketball player, maybe not an environmentalist — yet.”

KEVIN ANDERSON – South Africa top 10 tennis player and former Wimbledon finalist: “Once your eyes are opened to the plastic pollution problem, it’s hard not to care about the consequences. I hope that tennis players can be leaders in this space to raise awareness and help make the public more mindful of reducing single-use plastics when possible.”

CAROLINE GLEICH – American professional ski mountaineer and Everest: “People still don’t understand that the climate is changing, the earth is warming, and humans are causing it. It’s pretty basic science, but there’s a lot of misdirection and some people just don’t believe the science. Science isn’t something to believe in—it’s facts.”

MATHIEU FLAMINI – Former Marseille, Arsenal, AC Milan and France footballer: “I believe that if we wait for governments and corporations to take the lead and act, then it will be too late for our natural world.”

ETIENNE STOTT – London 2012 Olympic Canoeing Gold Medallist: “I am really quite terrified of the prospects for our society and civilisation if we don’t take action on climate change. The sense of emergency of it is just so important that we need to get a hold of this. We are in the situation where we need to turn this catastrophe that we are sleepwalking into around.”

LEWIS HAMILTON – Six-times Formula One World Champion: “I don’t allow anyone in my office, but also within my household, to buy any plastics. I want everything recyclable, down to deodorant, down to toothbrush, all these kind of things. I’m trying to make as much change as I can in my personal space. I sold my plane over a year ago. I fly a lot less now. I’m trying to fly less through the year.”

TIA BLANCO – Pro Surfer from Puerto Rico, twice World Champion and committed vegan: “From an environmental standpoint, animal agriculture is the leading cause of species extinction, ocean dead zones, water pollution, and habitat destruction. The most impactful thing you can do for the environment is to eat less meat and more veggies.”

FOREST GREEN ROVERS – English League Two club who are 100% vegan and football leaders in environmental sustainability, club policy: “We will not work with organisations directly involved in; Factory farming, animal slaughter, animal testing, arms, tobacco, nuclear power, fracking, GMO’s or anything else we consider to be unethical, immoral or just plain wrong.”

SHANE WARNE – Cricket great, multiple World Cup and Ashes winner: “At times in the past, it has been hard to know who to believe, but I think we all have to admit now that climate change is a huge issue. Scientists with proven facts are telling us things we can’t dispute about the rising temperatures, the rising sea levels.”

JONNY FA’AMATUAINU, former Samoan and Bath international rugby player: “My grandparents and other families who lived in a village on the coast in Samoa moved inland two years ago because of climate change…Samoa, Tonga and Fiji are all facing increased risks from rising sea levels and extreme weather.”