Walking through Cambridge last year I did not notice a huge difference between it and a certain other academic City, but on bike the difference is very apparent. Special bike paths, bike traffic lights and bike lanes in the roads that are actually wide enough, all make you feel much more welcome and safe as a cyclist.
During a visit to Cambridge botanical gardens I came across this fascinating new development using plants to generate electricity. The botanical gardens are also investing in a new research area for using algae to make biofuels.