Eat less meat, opt for carpooling, and unplug unused electronic devices -- do your bit and make a huge difference to saving Earth, suggests Google's Earth Day Doodle on Saturday.

Doing these small things could go a long way in helping save the only known planet in the universe that harbours life.

"Whatever you do today, we hope you're able to take a moment to savour and cherish this boundless, stunning Earth that we inhabit," Google said in a statement.

At an estimated 4.543 billion years of age, the Earth is also the densest planet in the solar system and the largest of the four terrestrial planets.

Google's Earth Day Doodle follows the story of a fox who dreams about an Earth that has been polluted and adversely affected by climate change.

The fox wakes with a startle, and urgently starts making small lifestyle changes to care for the Earth.

Along the way, the fox enlists friends - including Momo the cat, and Google Weather's favourite frog - to join its quest to protect and nurture the environment.

To combat things like coral bleaching and pollution, the three eco-rangers are inspired to take action such as eating less meat, carpooling, and unplugging unused electronic devices.

"That's some heroic work for tiny animals!" Google said.

Can we humans do a little more? That is probably the question that will arise in everyone's mind after watching the Doodle.

To help answer, Google Search offers easy Earth Day tips to help you do your part in saving our planet, including supporting critical conservation efforts such as wildlife conservation with World Wildlife Fund and coral reef conservation with The Ocean Agency.