Lots of little energy conservation savings lead to big reductions in greenhouse gas emissions. If you are not already doing these things, give some of these a go:
When not in the room, turn off lights
Turn off the computer if not in use and activate the computer sleep mode
Put on another jumper instead of turning on a heater
Sometimes you can ring, text or email a friend rather than being driven around the neigbourhood
When possible, walk, ride a bike or catch public transport rather than being driven around
Recycling helps
Buy things with less packaging
When going out, take your refillable sports drink bottle rather than buying a drink
Shorter showers also reduces our use of energy.
Turn off equipment when not in use
You might also like to share your interest in the environment with your local member of parliament. Email your thoughts to their office. Let them know you are a student and explain what kind of future you want.