Leaders say everything is on track at the Canada-EU summit, but storm clouds from Germany have emboldened CETA opponents.
One proposal suggests merging five job categories into one, which could affect salaries, union make-up.
Clause linking human rights to trade included in deal: EU officials.
Shell, BP, Statoil and CNOOC among oil and gas industry signatories calling for carbon pricing.
Lame-duck Barroso visits campaigner Harper.
Canada must adopt binding human rights standards for companies operating abroad.
Development would remove major irritant, but details of a potential compromise remain uncertain.