Why is my Ford Kuga's fuel efficiency decreasing?

I've noticed that my Ford Kuga's fuel efficiency has been decreasing lately. What could be causing this issue and how can I improve it?

It's important to regularly check and replace your air filter, as a dirty filter can decrease fuel efficiency. Also, make sure your tires are properly inflated and consider getting a tune-up for your engine.

Are you carrying excess weight in your car? This can also contribute to decreased fuel efficiency. Try to remove any unnecessary items from your vehicle.

Have you been driving more aggressively recently? Sudden accelerations and braking can use up more fuel. Try to maintain a steady speed while driving.