Scientists primarily attribute global warming to artificial increases in which greenhouse gas?

Scientists primarily attribute global warming to artificial increases to the greenhouse gas carbon dioxide. According to NASA, carbon dioxide levels have increase to nearly 38 percent as of 2009 due to the burning of fossil fuels, cutting down carbon-absorbing forests.

i believe the answer is c

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.