Since the Industrial Revolution the oceans have absorbed approximately one-half (almost 525 billion tons) of human-released CO2 emissions. Where on one hand this has moderated effect of greenhouse gas emissions, it is chemically changing marine ecosystems to the extent of 100 times more rapidly than it has changed in the last 650,000 years. Due to the absorption of massive amounts of carbon dioxide, the pH (a measure of acidity) in ocean surface waters has decreased by almost 30%. As CO2 gets dissolved in the ocean the water there becomes more and more acidic. The acidic oceans are a threat to the climatic conditions of the globe in several ways.
I hereby propose that such bacteria which convert acidity to alkalinity should be put in millions in the ocean to solve the problem of acidity existing there. And to reduce CO2 in atmosphere the micro biome of land should be changed by multiplying those micro organisms which convert CO2 to more acceptable form. The micro organisms selected for changing the micro biome of land should be from land and not ocean. Just like the micro organisms selected for changing the micro biome of ocean should be from ocean and not land. Research should be done to find out those microbes which absorb heat and have a cooling effect in the ocean and on the land. A layer of microbes on clathrates (or cathrates) might also help resolve the problem of methane.
A note on the bacteria: There are methanotrophs (also called methanophiles) which are prokaryotes and are able to metabolize methane as their only source of energy and carbon. They can grow anaerobically or aerobically and require single-carbon compounds for survival. In case of aerobic conditions, methanotrophs combine methane and oxygen to form formaldehyde, which then gets incorporated in organic compounds by RuMP pathway or serine pathway. The Type I methanotrophs are a part of the Gammaproteobacteria and they utilize the ribulose monophosphate (RuMP) pathway for the assimilation of carbon. On the other hand, type II methanotrophs are part of the Alphaproteobacteria and make use of the Serine pathway to assimilate carbon. Characteristically they also have a system of internal membranes using which methane oxidation takes place. Methanotrophs mostly occur in soils, and are especially more common in the proximity of environments where methane is produced. Their habitats include underground environments, mud, oceans, marshes, rice paddies, soils, and landfills.