Centuries: 9th century - 10th century - 11th century
Decades: 940s - 950s - 960s - 970s - 980s - 990s - 1000s - 1010s - 1020s - 1030s - 1040s
990 991 992 993 994 995 996 997 998 999 1000
... of photosynthesis is: 6H2O + 6CO2 + light → C6H12O6 (glucose) + 6O2 In simple English terms, this is carbon dioxide plus water plus light (energy) yields ...