CO1^

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= CO-AIR1
Leipzig \| dgskorpus_lei_14 \| 31-45m CO2 emissions used to be quite high in the past.
r	$INDEX1	PAST-OR-BACK-THEN1	I2	CO-AIR1	$NUM-ONE-TO-TEN1A:2d	$GEST-OFF^*
l						$GEST-OFF^*
m		früher		co zwei
Leipzig \| dgskorpus_lei_14 \| 31-45m Nowadays, there are CO2 filters as protection.
r			NOW1	CO-AIR1	$NUM-ONE-TO-TEN1A:2d	NET1C*	SECURE1*
l						NET1C*	SECURE1*
m			jetzt	co zwei		filt	sicher