Dear Jim: We have two teenage daughters who take long showers. Our water heating costs are probably very high. We are on a tight budget, but I want to use some solar water heating. Is there a system I ...

Iranian researchers have looked at how ultrasonic thermoelectric generators could be used to lower the operating temperature of solar modules. Their new system can generate cold steam via ultrasonic ...

Shortly after moving into my rental in 2017, I delightedly discovered three compost bays already built down the back of the garden. It took me five years to realise those cruddy old bays were the main ...