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spin [16.1K]
3 years ago
11

Where did the original atmospheric oxygen come from

Geography
1 answer:
faust18 [17]3 years ago
3 0

The correct answer is - cyanobacteria.

The atmospheric oxygen came from the cyanobacteria. These were one of the earliest living organisms on Earth. The cyanobacteria was using photosynthesis in order to create its own food. The photosynthesis process requires sunlight, carbon dioxide, water, and oxygen. The oxygen is mostly released as a waste product from the process of photosynthesis, thus the cyanobacteria were literally releasing oxygen that was ending up into the atmosphere. As more and more cyanobacteria there were across the planet, more and more oxygen they were releasing into the atmosphere, slowly changing the composition of the atmosphere, and setting the basis of it as we know it now.

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How has diverting water helped humans over the years?
serious [3.7K]

Answer:

damming rivers for hydroelectricity, using water for farming, deforestation and the burning of fossil fuels.

Explanation:

It helped in many ways as the following ways above

8 0
3 years ago
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Where do scientists fit into the process of making environmental laws?
4vir4ik [10]

hello there

Andrea's point is probably the answer you're looking for, however, you should keep in mind that many (most?) environmental laws are driven more by politics than by the available data. Scientists do research on any number of topics (environmental or not) that have implications for our society. We (scientists) like to think that policy makers take our data and results into consideration when drafting legislation, but I would say that in my experience this rarely happens. For one, there have rarely been any federal legislators who understand science. Even the few physicians who've gone into politics seem largely to fail to understand very basic tenets of science, or at least they don't often demonstrate it with their political actions. Leaving environmental issues, for example, if politicians took science into account, there would be no discussion in any school district in the country about whether or not evolution should be taught in schools, as there are simply *NO* scientists who are qualified to have an opinion who would suggest it shouldn't. Environmental issues are not really any different.

hope that helped bye

8 0
3 years ago
If you could stop violence from happening in the world, what are some ways you can prevent it from happening?
larisa [96]

Answer:

Here is some ways how you can help prevent Youth Violence if your studying it.

Explanation:

1. Promote family environments that support healthy development

Early childhood home visitation
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3 0
2 years ago
Tiny creeks or streams which merge to form a river ate called
evablogger [386]
<span>I believe its called, tributaries</span>
7 0
4 years ago
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melomori [17]
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6 0
3 years ago
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