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Types of Car Smoke and Their Causes

1. White Smoke
- Causes: Blown head gasket allowing coolant or water into the pistons.
- Indication: Coolant in the combustion chamber.
- Solution: Inspect and replace the head gasket.

2. Blue Smoke
- Causes: Worn piston rings letting engine oil seep into the combustion chamber.
- Indication: Burning engine oil.
- Solution: Replace the piston rings.

3. Black Smoke
- Causes: Incomplete fuel combustion caused by poor fuel quality, airflow issues, faulty spark plugs, or bad ignition coils.
- Indication: Inefficient fuel burn.
- Solution: Check and replace spark plugs, ignition coils, or fuel injectors.

4. Grey Smoke
- Causes: Oil consumption, faulty PCV valve, transmission fluid leak, or a failing turbocharger.
- Indication: Engine or transmission problem.
- Solution: Inspect and fix the PCV valve, transmission fluid lines, or turbocharger.

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The H2Rescue truck made history by traveling 1,806 miles (2,906 km) on a single tank of hydrogen. Built by Accelera (Cummins) with support from the DOE, this truck is designed for disaster relief and emergency situations.

Powered by a Cummins Accelera fuel cell engine and a 250-kilowatt motor, the truck used 168 kg (370 lbs) of hydrogen from its 175 kg (386 lb) tank. It cruised at 50–55 mph (80–89 km/h) on public roads, emitting only water.

According to the DOE, the trip saved 664 lbs (301 kg) of CO2 compared to a gasoline truck. The H2Rescue can provide 25kW of power for 72 hours without needing a refuel.

Weighing 33,000 lbs (14,969 kg), this truck carries essential supplies to disaster zones, produces 1 gallon (3.8 liters) of water per hour, and could save 1,825 gallons (6,908 liters) of gasoline annually, reducing emissions by 2.5 metric tons.

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