Home grocery delivery sounds like a frill for people too lazy to schlep to the store. But having food delivered can be more environmentally friendly than driving to the store, researchers say.
Having groceries delivered can cut carbon dioxide emissions by at least half, compared to driving to the store, according to a new study. That's because the delivery truck offers the equivalent of a "shared ride" for the food.
One way to measure greenhouse gases is simply to capture them at the source: You put an instrument on a smokestack, for example. Cities, however, are full of cars, buses, factories and homes that all use fuel or electricity. No one really knows how much carbon dioxide, the main greenhouse gas, comes from each.
The electric car may be the next big hope for reducing carbon emissions, but one environmental advocacy group says just how effective these vehicles are at limiting emissions depends on where you are in the country.
Scientists from Colorado and other national institutions are wrapping up a three-year research mission to study and measure greenhouse gases in the atmosphere. It’s the most extensive airborne measurement of these gases to date.