This document discusses various types of eco-friendly vehicles as alternatives to traditional gasoline-powered cars. It notes that hybrid cars capture energy from braking to power the vehicle using batteries, and can run solely on electric power for periods of time. Biodiesel is introduced as a blend of vegetable oil and diesel that can be used in existing diesel engines. Hydrogen vehicles use hydrogen as fuel. Solar-powered electric cars can recharge batteries using solar panels on the roof while driving. Eco-friendly vehicles produce fewer emissions, use less fossil fuels and materials, and have lower maintenance costs than regular cars. Major automakers are making these options more affordable to increase customer demand.