Black money refers to funds generated through illegal activities that are unreported to tax authorities. It exists in cash form and is often stored in secret overseas bank accounts. Common sources of black money include gambling, drug trafficking, tax evasion, and political corruption. India is estimated to have over $1.4 trillion of undisclosed funds stored in Swiss banks alone. Recovering this black money could help fund critical infrastructure and development projects in India. However, its return could also cause economic issues like inflation if not managed properly by the government. Citizens need to actively fight corruption to reduce the generation of new black money.