div#settinggoals { display: none; }
div#intprocess { display: none; }
div#greenmaterials { display: none; }
div#realcostsbenefits { display: none; }
div#efficiency3 { display: none; }
div#cogeneration { display: none; }
div#boilers { display: none; }
div#geothermal { display: none; }
div#solar { display: none; }
div#rain { display: none; }
div#intro { display: none; }
div#history { display: none; }
div#benefits { display: none; }
div#basics { display: none; }
div#evaluating { display: none; }