Everyone can affect their emissions to some extent.

* Don't have children is a big one, or limit the number you have. One child is equivalent to 24 people people not driving, someone quoted to me the other day. It's not a popular idea though.

* Drive a small car not a big car. Drive about 90kph, it's more fuel efficient than driving faster.

* Buy local - It might be more expensive in money, but milk shipped 4,000 kilometers is more expensive in emissions than milk from a supplier in your region.

And so on ...