Saving the Planet? Around 2 billion sites on the web On 10 million physical machines PHP drives at least 50% Currently ~50% PHP 7 Adoption which is about 2.5M physical servers 3000 KWH/year per server costs approx. US$400 Data center cooling doubles that 0.5kg CO2 per KWH At 50% Adoption US $2B savings 7.5B KWH Savings 3.75B kg less CO2 Let's double that to 100%! $4B savings 15B KWH Savings 7.5B kg less CO2 Do your part Upgrade to PHP 7!