identify problems that scientists still need to solve in reducing harmfull vehicle emission?

Question

this is for my revision

Answer 1

Hi. They must eliminate carbon from the fuel. The only solution for now is either hydrogen or electric power (or a H/E hybrid).

Answer 2

i wrote this: there are a number of issues that still could desire to be solved by utilising scientists to decrease risky emissions, the biggest of those being tackling emissions from diesel engines. the main substantial challenge with diesel engines is smoke and particulates, filters are very valuable at removing those yet become on the instant blocked so a device to continuously clean them ought to be progressed. yet another possibility as burning the carbon (soot) to sort carbon dioxide, besides the shown fact that this reaction in basic terms happens at rather extreme temperatures (above 500°C - six hundred°C) while diesel engines are rather cool, plus, the burning carbon might attain temperatures in way over 1000°C subsequently unfavorable the clear out. uncertain if ti is solid, yet solid luck.

Answer 3

The production of catalytic convertors for vehicles releases large amounts of nitrogen oxides into the atmosphere. This is because the catalytic metals eg. Pt are applied as the nitrate salts dissolved in nitric acid which is then removed by giant ovens. Does seem kind of pointless thinking about it now...

A method needs to be found that isn't intrinsically polluting itself!

Answer 4

All the polution problems of internal combustion engines can be fixed by good engineering. Most important is developing fuels and modifying the process used in engine design.