The major causes of biodiversity decline are land use changes, pollution, changes in atmospheric CO2<span> concentrations, changes in the nitrogen cycle and acid rain, climate alterations, and the introduction of exotic species, all coincident to human population growth. For rainforests, the primary factor is land conversion. Climate will probably change least in tropical regions, and nitrogen problems are not as important because growth in rainforests is usually limited more by low phosphorus levels than by nitrogen insufficiency. The introduction of exotic species is also less of a problem than in temperate areas because there is so much diversity in tropical forests that newcomers have difficulty becoming established (Sala, </span>et al.<span>, 2000).</span>
The temperature is rising which makes the Artic and Antarctic ice melt, rising the sea levels.
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The right answer is C) increased cases of asthma and allergic response.
The prevalence of asthma is constantly increasing, especially among children. In the past 5 years, the number of hospitalizations for asthma has increased, especially among children.
Who says asthma says environment. The environment plays a role in the onset of asthma and is a trigger for asthma attacks. These are environmental factors, allergic or non-allergic, which are at the origin of the inflammation of the respiratory tracts. Environmental control is therefore an important parameter in the management of asthma.