I saw these solar compactors in London and I think they are absolutely AWESOME!
As the name suggests, the bins are solar powered to compact trash.
These "BigBellies" are good in many ways:
(1) they make use of renewable, clean and green (& free!) solar energy
(2) they help compact the trash so that effectively, the same landfill can hold more compacted trash
(3) they reduce the number of trips required for waste collection --> reduce operating costs, reduce fuel consumption by trash collection trucks, reduce greenhouse gas emissions
I hope to see more of these everywhere in the world!
GREEN TIP: If you aren't recycling your plastic bottles, juice cartons, food containers, try to crush them to eliminate any airspaces before disposing the items.