id	keyword
easat-240	environmental
easat-240	process
easat-240	production
easat-240	phosgene
easat-240	performance
easat-240	polycarbonate
easat-240	vol
easat-240	impact
easat-240	assessment
easat-240	life
easat-240	method
easat-240	cycle
easat-240	figure
easat-240	evaluation