Watch: Apple, Google celebrate Earth Day 2017, run videos on saving planet

Apple is now 100 per cent renewable in 24 countries, including all of its data centres

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