NOVELTY - An algae production and dimethylsulfide (DMS) natural cloud-seeding agent secondary production combination system comprises carbon dioxide (CO2) source, 1st algae-producing bioreactor (18) supplied with concentrated CO2 from CO2 source, and 2nd DMS-producing bioreactor (2) supplied with algae in which 1st bioreactor produces optical thinning effect, 2nd bioreactor contains culture of grazers that eat algae supplied by 1st bioreactor, and grazer feeding on algae causes algae to release DMS.    USE - An algae production and dimethylsulfide natural cloud-seeding agent secondary production combination system for global climate change and ocean acidification geo-engineering e.g. global climate restoration, ocean revitalization, ultra-clean transportation, drought and famine relief, and primary and secondary global cooling and polar ice stabilization.    ADVANTAGE - Algae production and dimethylsulfide natural cloud-seeding agent secondary production combination system converts power-plant and transportation CO2 into marine algae, amplifies land-based CO2 capture, restores ideal alkaline ocean pH, improves soil pH, enhances soil moisture retention in semi-arid lands, provides drought relief to drought-stressed lands, has improved harvest bloom levels, reduces lake and river bacteria levels, and clears agricultural runoff and bacteria in rivers.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for ocean-amplified CO2 capture and amplified release of DMS natural cloud seeding agent at sea which involves performing land-based capture of concentrated CO2 from land-based CO2 source, sending land-based conversion of captured CO2 to heavier-than-water marine algae in greater than or equal to 1 bioreactor to obtain ocean seed, transporting ocean seed to seaports, performing ocean distribution and dispersal with added nutrients, performing ocean-amplified blooming, and attacking blooms with ocean grazers e.g. zooplankton and krill to release DMS at sea in which ocean grazers produced by inland bioreactors are transported for release at ocean algal bloom site.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of algae production and dimethylsulfide natural cloud-seeding agent secondary production combination system.    2nd bioreactor (2)    Electric power plant (10)    Decompression chamber (16)    1st bioreactor (18)    Exhaust stacks (22)