Photophysics -- Photochemistry -- Parameters of exposure -- Measurements in assessment of weathering conditions -- Climatic conditions -- Methods of outdoor exposure -- Laboratory degradation studies -- Weathering cycles -- Sample preparation -- Weathering data interpretation. Lifetime prediction -- Artificial weathering versus natural exposure -- Effect of weathering on material properties -- Testing methods of weathered specimen -- Data on specific polymers -- Effect of additives on weathering -- Weathering of compounded products -- Stabilization and stabilizers -- Biodegradation -- Recycling -- Environmental stress cracking -- Interrelation between corrosion and weathering -- Weathering of stones.