Environmental Science
What is the name of the action plan for sustainable development in the Twenty first century framed in the Rio Declaration on Environment & Development (1992)?

Agenda 21
Rio 21
Declaration 21
Action 21

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Environmental Science
The main reason why vegetables take longer to cook in boiling water at high altitudes is because:

There is less oxygen in the air at high altitude
Saturation vapor pressure decreases with increasing altitude
Water boils at a higher temperature with higher altitude
The temperature of the boiling water decreases with increasing altitude

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