Sentences with phrase «therefore low oxygen levels»

Saurabh Saha of BioMed Valley Discoveries in Kansas City, Missouri, and his colleagues wondered whether they could use the bacteria to selectively kill mammalian cells within cancerous tumours, which often have a poor blood supply and therefore low oxygen levels.

Not exact matches

But the evidence shows this can't be true; temperature changes before CO2 in every record of any duration for any time period; CO2 variability does not correlate with temperature at any point in the last 600 million years; atmospheric CO2 levels are currently at the lowest level in that period; in the 20th century most warming occurred before 1940 when human production of CO2 was very small; human production of CO2 increased the most after 1940 but global temperatures declined to 1985; from 2000 global temperatures declined while CO2 levels increased; and any reduction in CO2 threatens plant life, oxygen production, and therefore all life on the planet.