Answer: A <u><em>It's made of iron and magnesium </em></u>
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Explanation: Oceanic crust is denser because it generally melts to a higher fraction than continental crust. When rocks melt some minerals melt before others. Generally lighter minerals melt before denser ones.
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<span>The correct answer is: True.</span>
Catabolism together with anabolism is a part of metabolism. It is the set of metabolic pathways in which the molecules are broken down into smaller units and the energy is released. Released energy of catabolism (in a form of ATP) is used for the maintenance and growth of cells. Examples of catabolic processes are glycolysis, the citric acid cycle or degradation of macromolecules: proteins into amino acids, lipids into free fatty acids...
Answer:
Biofuels have been around longer than cars have, but cheap gasoline and diesel have long kept them on the fringe. Spikes in oil prices, and now global efforts to stave off the worst effects of climate change, have lent new urgency to the search for clean, renewable fuels.
Our road travel, flights, and shipping account for nearly a quarter of the world's greenhouse gas emissions, and transportation today remains heavily dependent on fossil fuels. The idea behind biofuel is to replace traditional fuels with those made from plant material or other feedstocks that are renewable.
But the concept of using farmland to produce fuel instead of food comes with its own challenges, and solutions that rely on waste or other feedstocks haven't yet been able to compete on price and scale with conventional fuels. Global biofuel output needs to triple by 2030 in order to meet the International Energy Agency's targets for sustainable growth.
The Hidden Costs of Turning Food Into Fuel
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THE HIDDEN COSTS OF TURNING FOOD INTO FUEL
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Explanation:
