Water Per Joint. Learn more about how much water it takes for all kinds of crops, foods and fuels at WaterFootprint.org. Take one pound of cannabis and, for the sake of this example, roll it into 450 joints (approximately 1 gram/joint).
Weather in Rome Italy in January. January is definitely the heart of winter. So expect winter weather, but mild winter weather. Rome doesn't really get much sleet and snow (although it can happen.) Sometimes there is a quick hail shower, but again, it's not that common.
Oh yes, it certainly rains. Winter weather in Rome, and in central and southern Italy generally, may be reasonably mild but it can be very wet. The wettest months are November and December but it can carry on raining right through until March. Piazza Navona, Rome, on a rainy December day. The River Tiber has a history of flooding during the winter months but there's no need to worry. The city itself is rarely affected - you'll see the high embankment walls running alongside the river. Built in the 19th Century, they contain any rise in water level.