Especially many proponents of feminism have argued that the achievements of women have been insufficiently represented in works of history up through the 20th century. Therefore, many historians and especially those who concentrate on women's studies[?] have drawn attention to women who can be considered historically significant.
... sulfide instead of water in their photosynthetic pathway:
CO2 + 2 H2S → CH2O + H2O + 2S
Some of these produce globules of sulfur as a waste produc ...