Answer:
Nitrogen must be in a gaseous state
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Explanation:
Answer:
Our best guesses are that life began somewhere between 3.5 Billion and 3.8 Billion years ago
Answer:
Global warming is an aspect of climate change, referring to the long-term rise of the planet's temperatures. It is caused by increased concentrations of greenhouse gases in the atmosphere, mainly from human activities such as burning fossil fuels, deforestation and farming.
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