data servers will generate more greenhouse-gas emissions than all its airlines

For example: In a decade or so, according to the consulting firm McKinsey, the planet's data servers will generate more greenhouse-gas emissions than all its airlines out together. Many of us in the world's rich nations are using the Cloud more and more -- to backup our photos, keep our email, even process our data. That has consequences in the physical world where we live. We should pay attention to them.