There are a few ways to do this. You can try and build a building carbon negative, or you can retrofit an already existing building to become carbon negative. To be carbon negative is to produce enough energy to power the building while the surplus is fed back into the grid. The trick is the energy has to be carbon neutral. Solar panels can be used to produce carbon neutral energy. If your solar panels produce more energy than needed, the surplus gets fed back to the grid and the building is not carbon negative. There are a lot of small things that can be done to reduce the energy usage and the carbon output in a building. You can make sure that all of the windows and doors are sealed properly, change out incandescent light bulbs for CFL’s, use a solar hot water heater, make sure the building is properly insulated, have sensor lights installed so the lights will shut off when no one is in the room, turn the temperature on the thermostat down, etc…
Another thing you can do to help is plant a “green roof.” Growing grass or a garden on your roof helps absorb carbon from the atmosphere and, while unlikely to do the trick on its own, contributes to the carbon neutrality of your building.
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