Chronic - continuing for a long time, Soot - A black powder produced when something burns., Emission - gas or other substance that is sent into the air, Underestimate - To think or guess that something is smaller, cheaper, easier, or less important than it really is, Quantity - To measure something and express it as a number or amount., Diesel - type of heavy oil used as fuel in engines, especially for trucks and buses., Monsoon - A seasonal wind in South and Southeast Asia, often bringing heavy rains., Avert - To prevent something unpleasant from happening., Fauna - All the animals living in a particular area or period in history., Multifaceted - Having many different aspects or features., Hazardous - Risky; dangerous., Fragile - Easily broken or damaged.,

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