Where I'm from(Poland) summers can get stupidly hot, 40C on some days, it's difficult to sleep at night, yet I don't know anyone who has air conditioning at their house. It's a huge luxury, due to the cost of the unit + cost of electricity to run it.
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As an Australian in the depth of a hot summer, I beg to differ!
Almost every new house here includes a big air conditioner, and during hot months the euphemistically named 'load shedding' is often performed: http://www.afr.com/news/politics/sa-power-crisis-may-spread-...
Thus any improvements to (more) passive cooling technologies are very welcome
I wouldn't describe Australia as poor though.
Where I'm from(Poland) summers can get stupidly hot, 40C on some days, it's difficult to sleep at night, yet I don't know anyone who has air conditioning at their house. It's a huge luxury, due to the cost of the unit + cost of electricity to run it.