Environment

Pollution has been found to be present widely in the environment. There are a number of effects of this:
· Sulphur dioxide and nitrogen oxides can cause acid rain which lowers the pH value of soil.
· Nitogen oxides are removed from the air by rain and fertise land which can change the species composition of ecosystems.
· Soil can become infertile and unsuitable for plants. This will affect other organisms in the food web.
· smog and haze can reduce the amount of sunlight received by plants to carry out photosynthesis and leads to the production of tropospheric ozone which damages plants.
· Invasive species can out compete native species and reduce boidiversity. Invasive plants can contribute debris and biomolecules (allelopathy) that can alter soil and chemical compositions of an environment, often reducing native species competitiveness.
· Biomagnificarion describes situations where toxins (such as heavy metals) may pass through tropical levels, becoming exponentially more concentrated in the process.
· Carbon dioxide emissions cause ocean oxidization, the ongoing decrease in the pH of the Earth's oceans as CO2 becomes dissolved.
· The emission of greenhouse leads to global warming which affects ecosystems in many ways.