As TreeHugger reports, the Olso transit authority is currently installing new highly-efficient Siemens trains, aimed at making its subway network’s carbon footprint the smallest worldwide.
The new trains, made by Siemens Transport Division in Vienna, emit around 2.6 grams of carbon dioxide per kilometer traveled (for the metrically challenged think of it as 2/10ths of an ounce per mile). Over a 30-year lifetime that means 825 tons of CO2. So how good are those stats? Pretty good, it seems - the UK’s Aviation Environment Federation calculates efficient cars emit about 100-130 grams of CO2 per kilometer traveled, and long-haul planes about twice that amount.
The trains are 40% more efficient than their predecessors due to the use of regenerative braking - much like in electric cars such as the Tesla roadster that we reported on earlier.
Norway’s extensive utilization of hydro power plays a big part in minimalizing its carbon footprint. Unfortunately, the nation’s growing Moose population (currently at 100′000) is one of the major black sheep when it comes to greenhouse gas emissions. An adult moose emits about 100kg of methane gas in a year.
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