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PM2.5 levels can rise due to various sources such as vehicle emissions, industrial processes, construction activities, agricultural activities, and residential heating. Weather conditions like stagnant air, temperature inversions, and low wind speeds can also contribute to the accumulation of PM2.5 in the atmosphere.

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1y ago

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What product produced by yeats cells during fermentation causes bread to rise?

Carbon dioxide is the gas produced by yeast cells during fermentation that causes bread dough to rise through the process of leavening. This gas gets trapped in the dough, creating air pockets that expand and make the bread rise.


Why do gases and liquids rise when heated?

Gases and liquids rise when heated because the increase in temperature causes the particles in the substance to gain energy and move faster, leading to a decrease in density. This causes the heated substance to become less dense than its surroundings, resulting in it rising.


Which chemical change causes a cake to rise?

The thermal decomposition of baking powder. Baking powder is also known as sodium bi-carbonate or sodium hydrogen carbonate. When heted it undergoes thermal decomposition., releasing carbon dioxide in thre process. It is this release of CO2 that makes pastry rise when being baked.,


What causes pH levels to rise in river water?

pH levels in river water can rise due to factors such as discharge of industrial waste, agricultural runoff containing fertilizers and pesticides, or natural weathering of rocks that release alkaline substances. These inputs can increase the concentration of basic ions in the water, leading to a rise in pH levels.


Does hyperventilation causes blood pH to rise or fall?

Hyperventilation causes 'Decrease' in carbon bi oxide level in blood. It causes, what is called as 'Respiratory alkalosis'. Symptoms are dizziness, light headedness and numbness of the hands and feet. If patient continue to hyperventilate, she lands up in a condition called 'Tetany' witch is common in females, as they are socially discriminated. In Tetany, patient's thumb get typically 'Inward' and she may land up in fits. If you willfully do hyperventilation, you will fall down, without your knowledge and may get head injury and die.