There has been a lot of bad publicity recently for cars with diesel engines. Many people bought these cars thinking they were more environmentally friendly because they emit less carbon dioxide than petrol-engined cars. However, some have argued that the soot particles emitted by diesel engines are making a major contribution to air pollution in cities and are therefore worse for people's health. This suggests it is unethical to own a diesel car, but owners of diesel cars should not rush out to sell them.

There are many causes of poor air quality in cities. Factories belch out fumes and air pollution is often brought in on prevailing winds from areas many miles away. There is not much point bothering about emissions from your diesel engine while this is the case. If you don't live in a city, this issue need not concern you anyway.

Manufacturers of diesel engines now fit 'diesel particulate filters' (DPFs), showing they have an ethically responsible concern for reducing the level of harmful emissions from diesel engines. It has been a legal requirement for many years for diesel engines to be fitted with a DPF. Il you drive a modern diesel car you can drive with a clear conscience.

It is accepted, even by their opponents, that diesel engines do not contribute as much to global warming; they are more efficient and consume fewer litres of fuel per kilometre than a petrol engine and emit less carbon dioxide. Emission of carbon dioxide into the atmosphere is the major contributor to global warming. There is little point in switching to a petrol-engined car on ethical grounds.

The fuel efficiency of diesel engines is just one of many advantages they have over petrol engines. They are more robust and last for many more kilometres than petrol engines. They are a superior type of engine. This is why lorries and buses all have diesel engines.

* * What is one assumption and one flaw(logical fallacies, conflation, equivocation, sweeping generalization) you can see from paragraph 2?
* * What is one assumption from paragraph 3?
* * What are two flaws(logical fallacies, conflation, equivocation, sweeping generalization) from paragraph 4?