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Gases that contribute to global warming by trapping radiant heat from the sun in the atmosphere. Use this tag for questions about sources of emissions, or ways of reducing emissions. For question about measurements use the [carbon-footprint] tag. For questions about offsetting use [carbon-offsetting]. For questions about the effects of [global- warming] use that tag.

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Building/improving continental trains to replace intra-continent flights?

There is very little demand for making it easier to buy long distance train tickets such as Portugal to Latvia. Most railway journeys in Western Europe are for short (<100 km) or medium (100-1000 km) …
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