The most common source of carbon monoxide pollution is vehicle exhaust. true or false

Yes, it is true... Because, gas is based on of fossil fuels. 

I hope this helps!

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.

Your best answer would have to be a.deciding whether to build a new baseball diamond at a nearby park.