It's sobering to see the costs exacted by the Valley's polluted air.

Just as air inside our homes and workplaces is often much more polluted than the air outside, so sitting in a new car can expose you to levels of toxic emissions many times beyond (health guideline) goals,

Those are very sobering numbers.

It was very sobering but in a way uplifting,

Sadly, in the name of progress, we have polluted the air, water, soil and the food we eat.

You'll find some heartening and some sobering conclusions.