1.waterFreshwater only makes 2.5% of the total volume of the world's water, which is about 35 million km3. But considering 70% of that freshwater is in the form of ice and permanent snow cover and that we only have access to 200,000km3 of freshwater overall, it isn't surprising that demand for water could soon exceed supply. The food and agriculture oraganisation of the united nations is predicting that by 2025, 1.8 billion people will be living in countries or regions with absolute water scarcity.
2.OILThe fear of reaching peak oil continues to haunt the oil industry. The BP satitistical review of world energy in june measured total global oil at 188.8 million tonnes, from proved oil resources at the end of 2010. This is only enough to oil for the next 46.2 years, should global production remain at the current rate.