Fire

'Fire''' is an orange, textured object that is caused by Lava, or if you touch the ground with Flint and Steel. It only appears on flammable blocks, but soon after consumes them. An exception to this is Netherrack, as it burns forever. You can also get fire on a flammable block by putting lava on it. Many blocks are flammable, such as Wool, Leaves, and wooden items.

Dangers of Fire
When in contact with fire, it deals half a heart to any mob in half a second. If the mob touches the fire for more than a second, fire damage would be dealt when the mob leaves the place where the fire is, dealing half a heart per second. Fire is also capable of destroying any item, so if any player/mob dies by fire, it is most likely that their items would be burnt. Lava pools can also set fire to nearby trees; this can burn down a whole biome.

Flammable Blocks

 * Wood
 * Leaves
 * Wool
 * Bookshelf
 * Wooden Planks
 * Wooden Fences
 * Wooden Slabs
 * Wooden Stairs
 * Netherrack
 * Signs

Trivia

 * As of before 0.3.0, once put, it would spread and destroy the entire world. As a result, it was removed. It was re-added in 0.7.0, with a texture similar to PC.Netherrackfire.jpg
 * A general rule of thumb is: If it burns easily in real life, it's flammable in Minecraft.
 * Animals killed by fire will drop cooked meat.