In Florida, winters are usually much warmer than in the rest of the country. In 2010, however, Florida's winter was very cold. Many days had freezing temperatures. Farmers were afraid the cold would their crops. So, they tried something new. They had helicopters fly over their fields. The air is warmer higher up. The helicopters pushed warm air to the ground. They hoped this would keep the plants from freezing. The farmers had a A factory B message C plan D village