A filter that converts these gases to less toxic gases it called catalytic converter
In the ideal case, the #combustion inside vehicles #engine results a group of gases consisting of #carbon dioxide and #water vapor, but in the normal case, other gases such as carbon monoxide resulting from incomplete combustion (hydrocarbons) also result from incomplete combustion and Nitrogen oxides (NOx) resulting from high temperature inside the combustion chamber are produced.
These gases are highly toxic to the environment in general,
#Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water , so we use the water softener . The resulting soft water is more compatible with soap and extends the lifetime of plumbing..
Water softening is usually achieved using lime softening or ion-exchange resins
water softening is necessary for boilers that produce steam to avoid lime deposition inside pipes or occurring corrosion to the pipes metal
Usually water #softener works by exchanging calcium, magnesium ions with sodium ions
Hard water fills the tank . As it passes through the #resin the hard water ions are attracted to the resin . by the time the water gets to the bottom of the tank it is soft .