if you had to build your house from local eco-friendly stuff, what would you use?

I've been daydreaming lately about building a house that's totally eco-friendly and made from materials that actually make sense for the climate I'm in. Like, if I lived somewhere super rainy, maybe bamboo or something? Or in a dry desert-y place, maybe adobe bricks or straw bale walls? Idk, just thinking out loud here... curious what other people would pick if they had to go totally local and eco-friendly.