Which greenhouse gas is produced by commercial refrigeration and air conditioning systems? PLESE HURRAHHY IM TIMED :(
carbon dioxide
fluorinated gas
nitrous oxide
methane

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels

As scientist had investigated evolution from a variety fields they have found

Produce proteins by following coded instructions that come from the nucleus of the cell.