I didn't mean to give the impression I agreed with the guy. I'd like to see how he arived at all those numbers he threw around. There is no way car production and bicycle production could have close to the same effect. And, the efficiency can't be compared either. It is just silly to even try.
But, Bike production is obviously a huge and modern industry. With huge modern industry comes industrial waste. The more bikes you replace early and the more of next years components you have to have, the more impact on the environment we cause.