Let's build one really great venue for summer sports, and one for winter.

And then build no more.

It's a luxury we can't afford. We already burn a huge amount of carbon to get people in and out every four years, but we spend a lot more building the venue, and for what purpose? 

Sure, the Olympics is symbolic. Even though it consumes a lot of carbon creating the venues every four years, it's a tiny drop in the bucket. But it's time to make symbolic sacrifices to help lead the way to real sacrifice, which is coming whether we want it or not.

The Zika virus gives us pause to think. Enough with the Olympic extravagance. We don't rebuild the UN every four years. So we can make due with really great venues, but just two.