It is a nice advice on how to reduce fuel cost but from my own point,it is better to convert your car cabreator to gas as gas is cheaper compare to petrol. Solar should be used in houses and stores that is a good idea because solar energy replenishes and Nigeria is a good country for solar energy because of the abundant sunlight No need of spending too much if you can afford solar,there is a solar that can pump water. The earlier the better because fuel price fit reach 1k soon