NEET BIOLOGY

Detailed explanation-1: -Carbon dioxide is emitted into the atmosphere by burning fossil fuels (coal, gasoline, and natural gas). Humans have come to rely on fossil fuels to power cars and planes, heat homes, and run factories. Doing these things pollutes the air with carbon dioxide.

Detailed explanation-2: -Factories contaminate the air by blowing chemical vapors and smoke out through vents and smokestacks, and by burning waste in open dumps or incinerators. Exhaust from generators, diesel trucks, and buses also fill the air with dangerous gases.

Detailed explanation-3: -Smoke from vehicles is generally caused by unburnt or partly burnt fuel. Burning engine oil can also cause a smoky exhaust. Black smoke is generally caused by incompletely burnt diesel fuel. Blue, white and other coloured smoke is generally caused by burning engine oil or unburnt fuel vapour.

Detailed explanation-4: -Burning excess amounts of gasoline and diesel fuel creates harmful byproducts like nitrogen dioxide, carbon monoxide, hydrocarbons, benzene, and formaldehyde. In addition, vehicles emit carbon dioxide, the most common poisonous greenhouse gas.