Truism aside, Europe hasn't a lack of fertile grounds nor good climate.

Europe has a pressing need for minerals and energy.

  > The reason almost the whole EU budget (hyperbole, but indeed 
  > it is a lot of the EU budget) is spent on agricultural 
  > subsidies is precisely to protect our food security.

Protect food security or export status? Case in point, we are overspending on agriculture. Also, it would have been better to trade with African countries wrt the real pressing concern. A missed chance.

> Food security is the first concern for every society, because without food we will all die.

It depends on what you mean by "first concern". Water security is the first concern by that reasoning; nuclear attack security too - without it, everyone dies.

But those aren't serious concerns in any practical sense: In most places in Europe there is plenty of water and food, and attention and resources are rightfully directed elsewhere.