Wasting wood is a serious problem in conserving the resources, which are distrib

Throwing away food means wasting the resources used in its production, such as water. This is especially foolish in dry countries such as Spain. The problem is set to get worse as climate change makes rainfall patterns less predictable.

Visas offer governments a way to control their borders, whether to regulate the flow of immigrants or to pick-out threats to security. But the paperwork and fees they entail also deter legitimate tourists and business travelers.