With roughly 7.9 billion people living on Earth, human consumption of the world's natural resources has become a hot topic.

The more people there are, and the richer their lifestyles, the more resources are consumed.

We need food and water to survive, but what if these resources disappeared?

The Global Footprint Network wants to raise awareness of this concern.

To do so, it started the Earth Overshoot Day, EOD, project.

EOD is the date each year when our ecological footprint exceeds the quantity of resources the Earth is able to provide.

The date of EOD changes every year.

Scientists determine it by studying several factors.

First, they measure how long it takes the Earth to regenerate these resources.

This is called world biocapacity.

They divide that number by our human footprint, or how much of these resources we regularly consume.

In the end, they reach the date of EOD after multiplying the result by 365.

In 2020, we reached EOD on August 22, which was later than in previous years.

In 2021, it came on July 29.

Every year, Global Footprint Network hopes to push EOD further into the year.

Every time we hit EOD before the end of the year, we're taking up resources that should be saved for the future.

To help people move the date later into the year, the Global Footprint Network's hashtag MoveTheDate campaign promotes ways of reducing our footprint.

Think about where your impact on the environment comes from.

Try eating local foods, using more public transportation, and buying greener products.

It will take action around the world and at every level of society to take on the problem of climate change, but with your participation, we can start pushing EOD a little later each year.

That way, we'll make sure there's enough to go around and have some left over for future generations.