Generate a list of five recommendations related to the following topic: "how to reduce carbon emissions"
Input: NoInput
1. Use public transportations instead of driving whenever possible.
2. Reuse and recycle as much as possible.
3. Choose natural materials (like wood) for furniture.
4. Switch to renewable energy sources like solar and wind.
5. Reduce meat consumption.
1. Adjust your car's fuel injection system to optimize fuel economy by retuning the carburetor or fuel injector. 
2. Drive less and carpool. 
3. Choose more fuel efficient vehicles. 
4. Use public transportation. 
5. Plant more trees as a carbon sink.