Next month, the US and Europe would like to make some progress in tearing down trade barriers, an archaic notion left over from the Colonial period in history.(1)

Special trade agreements with blocs, like The Hanseatic League of the 12th century, were always common, but restrictions enjoyed a popularity boom after the collapse of the East India Trade Company in 1799 became the poster child for the perils of free trade - 18th century globalization hysteria. 

Some people believe the Intergovernmental Panel on Climate Change (IPCC) is a small, unified body composed of the best scientists who make proclamations on lots of things.

That isn't really true. The actual IPCC is a tiny UN group, around a dozen people, but the bulk of the data is compiled by unpaid (well, unpaid by the UN) scientists who participate in working groups that argue over the science - it is not without some flaws. They use geographical and gender parameters for participation so a working group may not have the best scientists in the world, some will have been chosen because they needed to meet a cultural quota - and they still get to be heard. 

There are some places where food is easy to grow and some where it is not. Nature is not fair.

Expecting companies in countries with food to ship it everywhere for free is not practical and the poorest people don't have the money to import food, so they are stuck in a hunger Catch-22. There are differing schools of thought on how to solve the problem.

The positive approach - science - is to make it possible for food to grow in areas where food cannot grow now. Plants can be optimized scientifically to thrive in areas where they ordinarily would not. Then there is a less positive approach; tell poor people to eat bugs.