CNN reports that a giant dust storm has covered Mars. they say the dust has caused the planet's temperature to rise by 30° Celsius. i've always been under the impression that large amounts of dust in the atmosphere cool a planet by reflecting sunlight back into space. CNN says, "Such howlers [big ass dust storms] do not besiege our planet thanks to the abundance of water, whether in the oceans or the air, which prevents airborne dust from cooking the atmosphere."

ok, so the water keeps our planet's temperature from rising due to atmospheric dust, but what keeps the dust from forming big ass storms in the first place?