It's not just the first tweet, read the whole thread. > The Portuguese-Spanish border follows river valleys and is not associated with abrupt changes in climat

It's not just the first tweet, read the whole thread. > The Portuguese-Spanish border follows river valleys and is not associated with abrupt changes in climate or land-use. > The reasons for the mismatch are historical. In 2001, Europe’s answer to the mad-cow disease (BSE) crisis was banning the abandonment of dead livestock. [...] [Conservationists] convinced European Union legislators to delegate the choice to member states. Some countries, like Spain, resumed cattle abandonment under special conditions. Portugal never changed its laws.