How is earth different today from when it was first formed?

Answer 1

When the Earth was very young, volcanoes activities were intense and frequent, the continents were almost joined among themselves, the Earth surface was much hotter than today, frequent and heavy rains thunderstorms, lightning bolts hit the soil frequently, primitive animals began to form, and when they died, their decomposition started to form oxygen which began to push the ozone layer upwards. Vast forests began to grow rapidly. All above mentioned has been progressively disappearing, the continents began to change their shapes, a huge collection of animals' species started appearing and disappearing, the human being appeared 10 thousand years ago, and today we see the Earth suffering much deforestation, a lot of plants and vehicles are now releasing much carbon monoxide, and recently the global warming began to worry the governments allover the world.