Which gas most likely affects human health by contributing to global climate change?

carbon dioxide

Explanation:

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because with to much of it in the atmosphere it would become harder for us to breath and the affects of oxygen deficiency are bad.

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.

not sure if this is what you'r looking for nnew= nold