Answer:
Hypothesized causes for the declines include habitat destruction (the most obvious cause), climate change, pathogens, introduced exotic species, pollution, and increased UV radiation. These agents may act alone or in combination to contribute to the decline of amphibian populations.
Explanation:
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Organisms return carbon<span> dioxide to the </span>atmosphere<span> by respiration. It is not just </span>animals<span> that respire. Plants, algae and microorganisms do too. </span>Carbon<span> dioxide is also released into the </span>atmosphere<span> when fossil fuels such as coal and oil, and wood, are burned. hope this helps</span>