| http://www.w3.org/ns/prov#value | - As the balloon sinks deeper and deeper, the buoyant force acting on it decreases ??? ??? ??? The principal source of the Earth's internal energy is radioactivity ??? ??? ??? The surface of Planet Earth loses energy to outer space due mostly to radiation ??? ??? ??? The greenhouse gases" that contribute to global warming absorb more infrared radiation than visible. ??? ??? ??? In a mixture of hydr
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