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.
Rome has a better climate and generally in December is still possible to enjoy the city by foot. January and February are cold in Rome too. So my answer is quite straight : better you come here in spring/summer/early autumn.