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If the randomly generated map doesn't have enough land to reach the stage 1 greenery requirement, a Scrubber in the ocean can help boost this number. This raises a 2x2 square of sand tiles out of shallow ocean tiles, and is just the right size for a Toxin Scrubber. The second tier 1 building is the Sandbank.
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This is useful because the rock tiles that start on the map don't offer enough coverage on their own. The Mineralizer can convert ocean tiles into rock tiles, but only in shallow water, and the number of rocks that appear is somewhat random. The first one appears after placing three Turbines, and it's called the Mineralizer. The tier 1 list also has two buildings players will need to unlock. The best strategy is still to use Scrubbers to clean as many tiles as possible around each Turbine, then to use Irrigators to fill the clean tiles with greenery. Like an Irrigator, a Scrubber by the ocean will show a negative or positive number depending on whether players will lose or gain leaves when placing the building, but players shouldn't worry about this. A Scrubber placed along the coast will clean ocean tiles, and this will provide leaves without needing an Irrigator to finish the job. The Toxin Scrubber also has a new function: ocean cleaning. The Water Pump is just as important on the island as it is in the River Valley, because despite the nearby ocean the river channels are dry. Returning to the tier 1 tab are the Turbine, the Toxin Scrubber, the Irrigator, and the Water Pump. In general, the buildings in this tab will modify the global stats more effectively than regular buildings. The new tab is called the "climate tab," and it holds the Cloud Seeder from the first map. Players start out this stage with two tabs of buildings. These ocean tiles are polluted, and to reach the end of stage 1 players will need to clean them up along with the land tiles. As the name suggests, the Desolate Island is completely surrounded by ocean.
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