Pollution is defined as the introduction of contaminants into the natural environment that cause adverse effects. There are different types of pollution including air, water, soil, and noise pollution. Air pollution stems from harmful emissions from vehicles, burning materials, and industries. Water pollution involves contamination from chemicals, bacteria, or particulates that reduces water purity. Soil pollution prevents growth through contamination, while noise pollution disrupts living standards through loud human noises from various sources like traffic and concerts.