It is genetic - in my family there is no history of it as it is a recessive gene but my mum and dad were both carriers. In Scotland up to 13% of the population has red hair, but around 40% of the population is thought to carry the recessive gene responsible for the world's rarest natural hair colour.
On the other hand, synthetic base oil molecules are chemically controlled, which provides increased ï¬ lm strength and lubricity over petroleum oils. The performance qualities of base oils have a marked impact on the performance qualities of the ï¬ nished product.
It is better to use natural gas than crude oil because it is safer for our environment. Summary: 1. Crude oil and natural gas are fossil fuels that are used for heating. 2. Crude oil or petroleum consists of hydrocarbons and other organic compounds while natural gas consists mostly of methane and hydrocarbons or ethane. 3. Crude oil and natural gas are used for vehicles, but the demand for crude oil is greater than for natural gas because it is cheaper.