Show Changes of Climate te A scientist who recently investigated the hc causes of secular variations in tern tern- at the earths earth's surface thinks that hat they are more probably due to hanges in m the amount of carbonic icid in the atmosphere than to variations varia varia- Cons In the heat of the sun If It the tho amount of carbonic acid that the ali ail tow ow contains captains was Vas yas diminished a little littlen n nore r than Jhan half the mean temper temperature turo 11 over the earth would it is stated about bout eight degrees which would le Se e sufficient m to bring on another gla- gla sial period On Oil the other hand a an increase in in- crease arCane r of carbonic acid to between two and three times Us present amount raise the mean temperature 15 t j and renew the hot times Umes of Ih Eocene epoch I |