(Bloomberg) -- Cie. de Saint-Gobain of France offered to buy Australia’s CSR Ltd. for A$4.3 billion ($2.8 billion) as the building industry consolidates amid a shift to more climate-friendly materials.Most Read from BloombergYour 401(k) Will Be Gone Within a DecadeLargest Covid Vaccine Study Yet Finds Links to Health ConditionsPlay VideoUS Tells Allies Russia May Launch Anti-Satellite Nuclear Weapon Into Space This YearUS Stock Futures Slip Ahead of Nvidia Earnings: Markets WrapThe offer price o