Kansas and Iowa, rich in wind resources, can provide more electricity than other states.

If that sounds ambitious, consider that the country has installed some 50, 000 wind turbines on land over the past two decades. They now supply roughly 5 percent of the nation’s electric power, a figure that reaches double digits in particularly windy states like Kansas and Iowa.

Home to 25% of the world’s oil reserves, the Eastern Province is the economic engine room of Saudi Arabia, accounting for more than half of the Kingdom’s oil production and about 7% of total global output.