http://en.wikipedia.org/wiki/Co2#Toxicity
Sure, a well run diesel engine produce mostly CO2, is toxic by itself.
Getting incomplete combustion with black smoke and higher level of CO is no problem whatsoever. It can be seen happening automatically on older engines with worn injection nozzles and therefore poor atomisation of the fuel.
Restricting the airflow for to an engine is not high technology, you could use a raincoat to partially cover the air filter. I am sure a skilled mechanic could come up with more ideas for getting bad performance out of an old engine.
Sure, a well run diesel engine produce mostly CO2, is toxic by itself.
Getting incomplete combustion with black smoke and higher level of CO is no problem whatsoever. It can be seen happening automatically on older engines with worn injection nozzles and therefore poor atomisation of the fuel.
Restricting the airflow for to an engine is not high technology, you could use a raincoat to partially cover the air filter. I am sure a skilled mechanic could come up with more ideas for getting bad performance out of an old engine.