Multiple choice. Which practices have reduced air pollution in Western Europe?

requiring the use of catalytic

converters

monitoring the use of water

improving the efficiency of engines

developing cleaner-burning fuel

adopting agricultural intensification strategies

The correct options are:

- Improved engines; engines were improved significantly so that they can have the same power and agility but by using less fuel.

- Cleaner burning fuels; it has been invested a lot of time and money into improving the fuels and making them as effective as possible but also removing or lowering the most dangerous components towards the environment.

- Catalytic converters; this devices for exhaust emission control manage to convert the toxic gasses and polutants into less toxic pollutants by managing to catalyze a redox reaction.

in my opinion, ap calculus was the most difficult. i often struggled with it a lot. however, i have gotten a lot better.

why do i not wanna answer this