How long until the demand becomes greater than the supply ?
Freshwater is only 2.5% of all th water in the world but 70% of that freshwater is in the form of ice or covered in snow. According to the food and agriculture organization of the United States by 2025 1.8 billion people will be living in countries or regions with absolute no water.
According to the BP Statistical Review of World Energy the total global measure is of 188.8 million tones which is enough oil to last for the next 40 years, if the global production remains at the same rate.
Similar to oil, natural gas has enough gas in proven reserves to meet 52 years of global production.
Without this element, plants cannot grow. It is a essential fertilizer that can only be found in certain countries. Scientists from the Global Phosphorus Research Initiative predict phosphorous to become scarce in 50 to 100 years.
This is the largest fossil fuel reserve; as it is we have enough coal to last about 122 years.