If enabled, the particles don't move when the emitter moves. If false, when you move the emitter, the particles follow it around.

	particleEmitter.useWorldSpace = true;

using UnityEngine;
using System.Collections;

public class Example : MonoBehaviour {
    void Example() {
        particleEmitter.useWorldSpace = true;
    }
}

import UnityEngine
import System.Collections

public class Example(MonoBehaviour):

	def Example() as void:
		particleEmitter.useWorldSpace = true