For seven years now, Atlantic puffins have been abandoning chicks and eggs in their nesting colonies because they cannot find enough food. The ocean is teeming with mackerel which consume the small fish that puffins normally feed to their offspring.
Understanding exactly how pollinators – particularly bees - and the plants they pollinate are affected by human activities requires extensive knowledge. This knowledge is also important in calculating the value of pollination ecology.
Ammonia causes the disgusting smell of urine in liquid manure from pigs and cattle. Scientists are not far from finding a way of stopping the formation of ammonia, although, this will not entirely remove the smell.