Super Friends (1973)

S1E6 The Shamon 'U'

Dr. Shamon employs a colossal magnetic "U" along with a laser weapon to pull a solid gold meteorite down to Earth. Unbeknownst to him, his method of "sky-mining" inadvertently releases rare gases from the cosmic cloud. When these gases combine with Earth's oxygen, they create two distinct mists: a green mist that causes flora and fauna to expand far beyond their usual dimensions, and a red mist that shrinks both plants and animals dramatically.