The letter E represents:
The letter E represents:
The letter E represents:
The letter D is related to the formation of:
Which one is not a consequence of burning fossil fuels is ..
The acididification of oceans caused by the excess of carbon dioxide in the atmosphere is a threat for marine organisms like fish or seals.
This is a living organism that helps to produce the majority of oxygen in the atmosphere.
The organisms that helps to transform the atmospheric nitrogen in simple nitrogen molecules and vice versa are
The process by which bacteria transform atmospheric nitrogen (in air) into nitrogen molecules that are used by plants is called.
Artificial fertilizers are an environmental concern because they can pollute water causing algal blooms.
The proccesses that balance the levels of carbon dioxide and oxygen in the atmosphere are:
Which gas is increasing in the atmosphere and threatening the world with the greenhouse effect?
What is the main source of increasing greenhouse gases?
Nitrogen is released into the atmosphere by:
The greatest concentration of nitrogen on the planet Earth is found in:
Which cycle relies heavily upon bacteria?
Many marine organisms incorporate carbon into their shells. These shells become part of the
Groundwater is water:
Most fresh water exists as:
Does precipitation happen before or after condensation?
How you can name the water that flows in rivers and streams into the oceans and lakes
What is the correct term for plants releasing water from their leaves, which then evaporates?