Although the top 10 environmental issues that face the planet can be at best “subjective” we have attempted to aggregate and prioritise the list in order to put things into perspective.
Population
Without a doubt the biggest issue facing the environment is over
population of humans. All other major environmental issues flow from the
very fact that we are over populating the planet. The worlds population has tripled in the last 60 years placing stress on every aspect of the environment. More land is developed every day to accommodate the urban spread. In 1950 the population stood at 2,555,982,611 compared to 2012 which
it now stands at over 7,000,000,000. The actual maths is that the worlds
population has increased by almost 3 times. That is staggering when you
think about it. That figure is increasing even as we speak!

