One tonne challenge

So I went to the One Tonne Challenge website to see what it has to say. Turns out my emissions are 3.17 tonnes (out of a national average of 5ish). When I do all the reductions they recommend, it goes down to 3.14. The problem is that I have no control over my heating/cooling systems and the energy efficiency of my home and major appliances because I rent. So if I seriously wanted to reduce my emissions I'd have to move. Which wouldn't actually help the environment, because someone else would just move into my apparently and keep using the same HVAC and appliances. If they actually want me to reduce my emissions by one tonne, they should come up with some advice that's better for renters.