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This year marks 54 years since Earth Day first began.

Organisers say it's an opportunity for people across the globe to come together, not only to celebrate the world, but also to raise awareness about how crucial it is that people take steps now to protect the planet.

Earth Day takes place every year on 22 April and in previous years, people have taken part in protests, marches and big clean-ups to highlight the importance of being green and taking care of the planet.

Read on to find out more about the history of Earth Day and what's happening this year - oh, and don't forget to try our super Earth Day quiz too.

When did Earth Day start?

The first ever Earth Day was held in 1970 in America when 20 million people took to the streets to protest against big environmental issues including oil spills, polluted rivers and air pollution.

Those who took part in the protests wanted the protection of the planet to be taken more seriously.

The first Earth Day led to lots of action including the passing of new environmental laws in America and later, lots of other countries too.

It's thought to have inspired the modern environmental movement we have today.

What is this year's Earth Day theme?

The organisers behind Earth Day decide upon a theme for the event each year.

The theme of this year's event is 'Planets vs Plastics', with organisers calling for a 60% reduction in the production of all plastics by 2040.

They want to see single-use plastics phased out, new policies to combat the environmental impact of fast fashion and for new sustainable alternatives to be found.

People are being encouraged to join in with activities such as community clean ups.

Try our Earth Day Quiz.

If you cannot see the quiz, click here.