Uncontrollable capital flows have demoted even the elected leaders of former imperial nation-states such as Britain and France into enablers of investor-friendly climates.
The suits are also uncomfortable to wear in hot climates and risk contamination when they are taken off.
This factor is a winner as fashion is going a bit seasonless, where layers are essential and designers have to appeal to consumers in climates around the world.
According to those who knew him, Guevara could be a less appealing prospect at closer proximity, even by the standards of ascetic revolutionaries in tropical climates.
With similar climates, agriculture has been a fruitful field of collaboration.
Fraught trade relations and off-putting investment climates (to say the least) normally prevent them from getting hold of the fancy imported goods they covet; which only sharpens the desire.
But quite how a nicer climate ends up producing more species is a mystery.That there is more sunlight and so more opportunity for photosynthesis at the tropics explains why warm climates create more living matter (or biomass, as it is known to ecologists).
Theories have ranged from the mundane (the greater stability of tropical climates imposes fewer random extinctions on species that are already there, allowing varieties to accumulate) to the wacky (that centrifugal force caused by the Earth's rotation exerts a slight pull towards the equator, thus biasing migration patterns).
In damp climates, real turf gets torn up by constant use.
Granted, Jascha Heifetz could make an aluminium fiddle sound beautiful, even played with a fibreglass bow, as he did on concert tours in tropical climates.
It also looks at fiscal and monetary policy in Brazil and compares the business climates of the country's two biggest cities, checks in with Peru's new president and reports on lead pollution in Mexico.
