Colonising another planetary system

[YaDinghus]

On 1/26/2018 at 11:34 PM, Moontanman said:

The addition of too little or too much of just trace substances could prevent us from living there at all..  

I like to think we humans are pretty adaptable - or adept at adapting our environment to our needs. However, I tend to agree that it's better to convert as much mass as possible into giant rotating habitats, than to colonize a planet. An earth-like planet's gravity well is a real barrier for space trade logistics, and once you've built an industry around creating space habitats, living space isn't a scarce commodity any more