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Please note that UPSpace will be unavailable from Friday, 2 May at 18:00 (South African Time) until Sunday, 4 May at 20:00 due to scheduled system upgrades. We apologise for any inconvenience this may cause and appreciate your understanding.
Aardverwarming en die kompetisie tussen onkruid en gewas
Daar is een fundamentele lewensproses wat alle lewende organismes onderhou en slegs in groen plante voorkom, naamlik fotosintese - 'n proses wat suurstof (O2) in die atmosfeer vrystel en koolstofdioksied (CO2) tydens die produksie van energieryke koolhidrate vasvang.