Consider the following facts:

1. Elements like nitrogen and phosphorus are essential for aquatic habitat.
2. Excess of nitrogen and phosphorus leads to faster ageing of water bodies.

Which of the above is/are true?

Although essential to the aquatic habitat, nutrients such as nitrogen and phosphorus may also cause over fertilisation and accelerate the natural ageing process (eutrophication) of lakes. This acceleration in turn produces an overgrowth of aquatic vegetation, massive algal blooms and an overall shift in the biologic community from low productivity with many diverse species to high productivity with large numbers of a few species of a less desirable nature.