There are now more than 7 billion people living on our planet! It’s a reason to celebrate and a stark reminder of how many people live and depend on the planet’s resources. Human population looks like it will continue to grow at breakneck speed, and that means it’s vital we make sure the earth can meet the needs of all 7, 8 or even 9 billion people – when we get to that point.

Climate change poses the biggest threat to meeting the basic food supply needed to nourish the world. Severe weather, changing rain trends and other turnarounds in global climate patterns have put important basic crops at risk – from wheat and corn to coffee. As the supply falls, the prices for food soar, making it too expensive for many in the world’s developing countries.

On top of that, more people means more energy use, and the need for clean, eco-friendly energy on a wide scale will become even more crucial in the coming years. So you’re now one of more than 7 billion people on the planet. What can every person do to keep the world safe?