How do you scar the earth on learn to fly 2?

I believe you're referring to the game "Learn to Fly 2" where you control a bird-like creature and fly around, causing destruction. However, there's no specific action called "scarring the earth" in the game.

Here's what you can do to cause significant damage and leave a lasting impact on the environment:

* Use your beak: Repeatedly tap the "attack" button to peck at the ground. This will create small craters.

* Dive bomb: Gain altitude and dive straight down at the ground. This will cause larger explosions and craters.

* Explode: Use the "explosive" powerup (if available) to create massive explosions, leaving a trail of devastation.

* Collect coins and buy upgrades: Some upgrades can increase the damage you inflict on the ground.

Remember, the "scarring" effect is mostly visual and won't be permanent. The game's world will regenerate after a short period, and you'll be able to wreak havoc again!