Re: Why Wooden Sleepers are better. Was [NSW] CityRail Delays Friday

["chris@enet21.com.au" <chris@enet21.com.au>]

so, timber sleepers are more environmental friendly than concrete?
the impact from extracting limesand from a beach and dredging sand from a
choked river is lesser than chopping down a whole forest which causes land
erosion which in turn washes down into the rivers choking them and
affecting water quality. Gravel is taken from extinct volcanoes (prospect
quarry etc.) not to mention a concrete sleeper would last at least twice as
long than a timber one. Imagine the uproar if they used timber sleepers on
the proposed line to Darwin or the VFT, I really doubt if that many could
be produced.


Chris

eikkert@my-deja.com wrote:

> > 1. You don't need to chop down trees - this may suprise some people
> > who think they magically appear out of nowhere. (the railways in
> > Australia, are partly responsible for deforesting much of Australia -
> > think  of all those wooden sleepers used since 1854 )
>
> And where do you think concrete comes from? Sand, lime, clays, they all
> have to dredged, extracted or mined. That causes quite an unbalancing
> effect to sensitive areas such as beaches or at an extreme case the
> filtering of underground aquefers.
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.