The document discusses fossil fuels, which get their energy from biomass that accumulated over millions of years to form fossils. Fossil fuels are non-renewable resources that have nearly doubled in consumption every 20 years since 1900. The energy from burning fossil fuels is used to generate electricity and power machines. However, relying on fossil fuels causes pollution, destroys landscapes, decreases tourism, and contributes to the greenhouse effect by releasing gases into the atmosphere. While fossil fuels are widely used as an energy source, their use also leads to various negative consequences like pollution of water and air and threats to underwater life and fishing industries.