We heat our greenhouse 100% with the sun. In cold months, we use a solar thermal heating system (similar to those used for solar water heating), and in warmer months, we rely on passive solar radiation. This means we emit no harmful pollutants, such as CO2, from propane, which is commonly used to heat commercial greenhouses! We supplement fossil fuel use in our tractors with plant-based biodiesel (B100), in order to reduce harmful emissions. We entered a conservation easement that protects our farmland from development forever. This means that our acreage can never be used for commercial or housing development. We set aside a 20-acre forested carbon sink area on our farm. This means that 20 acres of mature trees can collect harmful CO2 from the atmosphere, offsetting CO2 that we release when burning fossil fuels in our tractors or other equipment. We installed a 6KW solar photovoltaic system to offset >50% of our electricity use from the coal-based power grid. This means that more than ½ of our power comes from 100% emissions-free, solar energy! In addition, it means that on sunny days, we pump emissions-free, clean energy back to the grid for other consumers to use, helping to reduce harmful emissions (e.g. mercury, sulphur dioxide, and carbon dioxide) associated with coal-based electricity. In this way, we are helping tackle global warming at a local level.