User talk:Yessy180

Yessebell Velez                                     2-18-09 MS.Quesada                                       Room-232

Global Warming

Nautral phenomena such as solar variation and Volcanoes probably had a small warming effect from preindrustral times to 1950 and a small cooling effect from 1950 onward.These basic conclusions have been endorsed by at least 30 sientific societies and academies of sciece,including all of the major industrialized countries.While a small minority