Greenhouse emissions of tar sand, per barrel, are more than conventional crude oil. This is because, it takes more energy to extract the bitumen from the tar sand and more so, to convert the bitumen to usable oil taking up even more energy. This energy is usually derived from burning natural gas. Emissions by tar sand are approximately 100 kg CO2 per barrel while conventional oil is approximately 30 kg CO2 per barrel.
<span>The reason for this activity is because of where Japan is situated, on the joint of four different plates.</span>
Answer:
D - an area of relatively flat and low-lying land
Explanation:
Answer:
When its molecules lose energy, water becomes solid, it becomes ice. At falling temperatures, the density of water is altered. Water is formed by atoms and molecules. Falling temperatures lead to changes in that compound, in its volume. While density increases because of lower temperatures, water´s atoms and molecules get more tightly packed together. Water freezes from the top down.
Explanation:
