Solar panels are the best way to get your power for free. And while they’re built to last for 25 years or more, it’ll take some time to recoup your investment and not every manufacturer or installer will be around as long. An engineer and a solar expert confirmed Reviews‘ findings: The best panels have efficiency ratings that pack a powerful punch and come from manufacturers with a proven track record.
Identifying that you need a new boiler is one thing, understanding what boiler is best for you is another. So the pals from cast iron radiators 4u take you through the different types of boiler available, what to consider when deciding on which size of boiler to buy and how much it would cost to purchase and install a new combi-boiler.
Babies are hard work, so nobody is going to judge you if you sometimes run down to a drug store to pick up an easy bag of disposables to keep your baby clean and dry. However, it is easier than ever to look beyond the old disposable, and we hope this guide will give you inspiration.
When most people think of gardening, soil comes to mind. But plants don’t actually require it to survive. They mostly need the nutrients and minerals in the soil. Plants can grow in water, gravel, perlite, rice hulls, pine bark, cedar shavings, and other mediums, or even suspended in air.
The science of soilless gardening is called hydroponics. It may sound like something devised in a modern laboratory, but it’s been around for thousands of years. The essential ingredient is an oxygenated mineral-nutrient solution that’s circulated through plants’ roots.
Some scholars theorize the ancient Hanging Gardens of Babylon, one of the Seven Wonders of the World, was a hydroponic system. The Aztecs grew maize, squash, beans, amaranth, tomatoes, chili peppers, and flowers in high-output chinampas, or floating gardens, which were hydroponic systems. A traditional hydroponics system is still in use on Myanmar’s Inle Lake, and similar systems probably existed in ancient India, Greece, China, and Egypt.
In the early 1600s, the British scientist Sir Francis Bacon, father of the scientific method, conducted formal research on hydroponics, which he called “water culture.” Laboratory experiments continued into the 20th century. In 1937, William F. Gericke applied the experiments to large-scale commercial applications, and the modern hydroponics movement was born.
Today many people identify hydroponics with marijuana growers, who’ve made use of the technology. But much of the world’s greenhouse produce is now grown in hydroponics systems, including some of the lettuce, tomatoes, herbs, and veggies in many supermarkets’ refrigerated cases.